Two-pairs sentence example
The prevalent number of testes is one pair in the aquatic genera and two pairs in earthworms. But there are exceptions; thus a species of Lamprodrilus has four pairs of testes.
The insects of this order have mandibles adapted for biting, and two pairs of membranous wings are usually present; the first abdominal segment (propodeum) becomes closely associated with the fore-body (thorax), of which it appears to form a part.
They are disposed in two groups on either side, corresponding in the Polychaeta to the parapodia; the two bundles are commonly reduced among the earthworms to two pairs of setae or even to a single seta.
There are no setae and apparently only two pairs of nephridia, of which the anterior pair open commonly by a common pore on the third segment after the head, whose segments have not been accurately enumerated.
The head in most cases bears two pairs of tentacles.Advertisement
It carries two pairs of cephalic tentacles and a pair of sessile eyes.
Head bears two pairs of tentacles.
Pulmonata with two pairs of tentacles, except Janellidae and Vertigo; these tentacles are invaginable, and the eyes are borne on the summits of the posterior pair.
The head of an insect carries usually four pairs of conspicuous appendages - feelers, mandibles and two pairs of maxillae, so that the presence of four primitive somites is immediately evident.
They are developed on the ventral surface of the body and are six in number, one pair arising from the eighth ventral plate and two pairs from the ninth.Advertisement
Of special interest are cockroachlike forms, with two pairs of similar membranous wings and a long ovipositor, and gigantic insects allied to the Odonata, that measured 2 ft.
The Corrodentia retain vestigial maxillulae and two pairs of Malpighian tubes, but the wings are somewhat specialized in the Copeognatha and absent in the degraded and parasitic Mallophaga.
Its integument is marked by a large number of transverse grooves simulating the segmentation of Annelids, and near the anterior extremity close to the mouth are two pairs of recurved chitinous hooks.
Again, the adult Pentastomum shows no trace of appendages, unless the two pairs of chitinous hooks are to be regarded as the vestiges of jaws or ambulatory limbs.
These larvae are minute oval creatures with a comparatively short apically fringed caudal prolongation and furnished with two pairs of short two-clawed processes, which may represent the limbs of anthropods and possibly the two pairs of legs found in Acari of the family Eriophyidae.Advertisement
A doubly linked pair of atoms is denoted by the sign A with the index corresponding to the side; if there are two pairs of double links, then indices corresponding to both sides are employed.
The flowers are regular, with four free sepals arranged in two pairs at right angles, four petals arranged crosswise in one series, and two sets of stamens, an outer with two members and an inner with four, in two pairs placed in the middle line of the flower and at right angles to the outer series.
In Rhynchonella, where there are two pairs of kidneys, the internal opening of the anterior pair is supported by the gastroparietal band and that of the posterior pair by the ileoparietal band.
The quartic will have two pairs of equal roots, that is, will be a perfect square, if it and its Hessian merely differ by a numerical factor.
Denoting the two pairs of magnetic poles by N, S and N', S', there is attraction between N and S', and between S and N'; repulsion between N and N', and between S and S'.Advertisement
Limulus has two pairs of these, Scorpio as many as six pairs.
The appendages of the mesosoma generally suppressed; in the more primitive forms one or two pairs may be retained as organs subservient to reproduction or silkspinning.
The four suckers are here united to form two pairs or fused into a single pair.
Within the groove of the rostrum two pairs of slender piercers - often barbed at the tip - work to and fro.
The typical insectan ovipositor with its three pairs of processes, one pair belonging to the eighth and two pairs to the ninth abdominal segment, can be distinguished in the female.Advertisement
There is usually a marked difference between the wings of the two pairs.
After several moults the rudiments of two pairs of wings appear, and then the insect creeps up to the surface of the earth, and on to the vine.
This micrometer is provided with two pairs of parallel webs.
The area is laid out by two pairs of level drifts, parallel to each other, about 150 yds.
An ohmmeter in one form consists of two pairs of coils, one pair called the series coil and the other called the shunt coil.Advertisement
These are generally species of the genus Penaeus (like P. caramote of the Mediterranean) which are distinguished from all those already mentioned by having pincers on the first three, instead of only on the first two pairs of legs.
In conformity with these reductions the breastbone of the moas is devoid of any coracoidal facets; there is no trace of a keel, and the number of sternal ribs is reduced to three or even two pairs.
In practical work, the low resistances take the form of certain strips of metal which have on them two pairs of terminals, one termed " current terminals," and the other " potential terminals."
The second antennae, mandibles and two pairs of maxillae may also be claimed as of malacostracan type.
In the male the first one or two pairs of feet are modified into grasping organs.Advertisement
The next, the copepodid or cyclopid, stage is characterized by a cylindrical segmented body, with foreand hind-body distinct, and by having at most six cephalic limbs and two pairs of swimming feet.
Giesbrecht and Hansen have shown that the mouth-organs consist of mandibles, first and second maxillae and maxillipeds; and Claus himself relinquished his long-maintained hypothesis that the last two pairs were the separated exopods and endopods of a single pair of appendages.
The majority are distinguished from snakes by the possession of two pairs of limbs, of external ear-openings and movable eyelids, but since in not a few of the burrowing, snake-shaped lizards these characters give way entirely, it is well-nigh impossible to find a diagnosis which should be absolutely sufficient for the distinction between lizards and snakes.
But the limbs show with regard to development great variation, and an uninterrupted transition from the most perfect condition of two pairs with five separate clawed toes to their total disappearance; yet even limbless lizards retain bony vestiges beneath the skin.
The agamas have always two pairs of well-developed limbs.Advertisement
Typically there are two pairs - a proximal, more or less approximated on the postero-dorsal surface, and a distal pair, more widely separate.
It is, in common with others, a hollow process into which run two pairs of broad, coarsely transversely striated muscles.
There are also two pairs of distal antennae.
Structurally the Neuroptera are distinguished by elongate feelers, a large, free prothorax, a labium with the inner lobes of the second maxillae fused together to form a median ligula, membranous, net-veined wings without hairy covering, those of the two pairs being usually alike, the absence of abdominal cerci, and the presence of six or eight Malpighian tubes.
The Myrmeleonidae are large insects with short clubbed feelers on their prominent heads, and two pairs of closely similar net-veined wings, with regular oblong areolets at the tips.Advertisement
There are thus two pairs of coelomic ducts.
Among the Amphineura we find one pair of coelomic ducts in the Aplacophora, two pairs in the Chitons.
Assuming that these ancestral forms resembled the existing Nautilus in their internal anatomy, they had two pairs of renal ducts and one pair of genital ducts, which would apparently indicate, not a single metamere or unsegmented body, but three metameres.
There are however only two pairs of branchiae.
In Nautilus two pairs of auricles are present, corresponding with the two pairs of ctenidia.Advertisement
The central nervous system may be described as consisting of a collar surrounding the oesophagus, and two pairs of cords arising from the collar and passing backwards.
The two pairs of cords arise from the same point of the collar.
They are small rat-like rodents, with one pair of upper premolars, which are mere pins, as is the last molar, and the two pairs of limbs of normal length, with the metatarsals separate; the infra-orbital opening in the skull being triangular and widest below, while the incisive foramina in the palate are elongated.
The last representatives of the Muridae are confined to Australasia and the Philippines, and constitute the sub-family Hydromyinae, characterized by the very general presence of only two pairs of molars in each jaw.
Finally, the Philippine Rhynchornys is represented by a rat with two pairs of molars and a long shrew-like nose, the zygomatic arch of the skull being also placed unusually far backward.
The most remarkable members of the family are the sand-rats of Somaliland and Shoa, forming the genera Heterocephalus and Fornarina, in which the premolars may be reduced to two pairs.
The remaining rodents, which include two families - the picas (Ochotonidae) and the hares and rabbits (Leporidae) - constitute a second sub-order, the Duplicidentata, differing from all the foregoing groups in possessing two pairs of incisors in the upper jaw (of which the second is small, and placed directly behind the large first pair), the enamel of which extends round to their postericr surfaces.
Scudder have revealed insects with the general aspect of cockroaches and phasmids, but with the two pairs of wings similar to each other in texture and form.
Sometimes in very favourable soils and with vigorous trees two pairs of branches may be obtained in one season by summerstopping the erect shoots and selecting others from the young growths thus induced, but more commonly the trees have to be built up by forming one pair of branches annually.
From this pass off two pairs of cords, the pleural and pedal, in Proneomenia separate from their origin, in Neomenia united at first and diverging at a pleural ganglion.
There are two closely connected cerebral ganglia, from which arise the usual two pairs of nerve cords.
All the Crocodilia possess two pairs of musk-glands in the skin; one is situated on the inner side of the lower jaw.
Brontops seem scarcely separated from the type genus; but the name Brontotherium is applied to species with two pairs of incisor teeth in both jaws.
On the other hand, Palaeosyops is connected with Titanotherium by means of Telmatotherium of the upper Bridger and Washakia Eocene, a larger animal, with a longer and flatter skull, showing rudiments of horn-cores, only two pairs of lower incisors, and a general approximation in dental character to Titanotherium.
These are the two pairs of saints, St John with St Peter in front and St Paul with St Mark in the background.
The Langaza tomb had unusually elaborate architectural ornaments and two pairs of doors, one of wood, the other of marble.
It has the same moderately long, plump body, with a low dorsal crest, the continuation of the membrane bordering the strongly compressed tail; a large thick head with small eyes without lids and with a large pendent upper lip; two pairs of well-developed limbs, with free digits; and above all, as the most characteristic feature, three large appendages on each side of the back of the head, fringed with filaments which, in their fullest development, remind one of black ostrich feathers.
The length of the path of contact should be such that there shall always be at least one pair of teeth in contact; and it is better still to make it so long that there shall always be at least two pairs of teeth in contact.
In order that there may always be at least two pairs of teeth in action, each of those arcs should be equal to the pitch.
There are two pairs of specialized cerebral nerves innervating the praeoral lobe, and provided with peripheral ganglia placed near the termination of the smaller branches.
Corresponding with each pair of myotomes, and subject to the same alternation, two pairs of spinal nerves arise from the neurochord, namely, a right and left pair of compact dorsal sensory roots without ganglionic enlargement, and a right and left pair of ventral motor roots composed of loose fibres issuing separately from the neurochord and passing directly to their termination on the muscle-plates of the myotomes.
Of the corresponding pairs of appendages thirteen belong to the head and trunk, two pairs of antennae, one pair of mandibles, two pairs of maxillae, followed by three which may be all maxillipeds or may help to swell the number of trunk-legs to which the next five pairs belong.
Blondlot and P. Curie afterwards suggested that a single electrometer could be constructed with two pairs of quadrants and a duplicate needle on one stem, so as to make two readings simultaneously and produce a deflection proportional at once to the power being taken up in the inductive circuit.
It will be sufficient here to define them as Arthropoda for the most part of aquatic habits, having typically two pairs of antenniform appendages in front of the mouth and at least three pairs of post-oral limbs acting as jaws.
The most important excretory or renal organs of the Crustacea are two pairs of glands lying at the base of the antennae and of the second maxillae respectively.
In addition to these two pairs of glands, which are in all probability the survivors of a series of segmentally arranged coelomoducts present in the primitive Arthropoda, other excretory organs have been described in various Crustacea.
In the Phyllopoda it consists mainly of two pairs of ganglionic centres, giving origin respectively to the optic and antennular nerves.
The ducts are present only as a single pair, except in one genus of parasitic Isopoda (Hemioniscus), where two pairs of oviducts are found.
The wings of insects may consist either of one or two pairs - the anterior or upper pair, when two are present, being in some instances greatly modified and presenting a corneous condition.
The zodiac of Denderah; the Savoyards who carved their pine-forests into toys; the naked Derar, horsed on an idea, charging a troop of Roman cavalry; the long, austere Pythagorean lustrum of silence; Napoleon on the deck of the "Bellerophon," observing the drill of the English soldiers; the Egyptian doctrine that every man has two pairs of eyes; Empedocles and his shoe; the horizontal stratification of the earth; a soft mushroom pushing its way through the hard ground, - all these allusions and a thousand more are found in the same volume.
The whole flower may be looked upon as an adventitious bud bearing two pairs of leaves; each pair becomes concrescent and forms a perianth, the apex of the shoot being converted into an orthotropous ovule.
As the microscopic character of the corallum of these extinct forms agrees with that of recent corals, it may be assumed that the anatomy of the soft parts also was similar, and the tetrameral arrange ment, when present, may obviously be referred to a stage when only the first two pairs of Edwardsian mesenteries were present and septa were formed in the intervals between them.
But the two pairs of compartments will correspond to a single pair of numbers, e.g.
The somites of the body, except in Pauropus, either fuse after early development and form double somites with two pairs of appendages (Julus, &c.), or present legless and leg-bearing somites alternating.
When, however, the planes of polarization and analysation are parallel or crossed, the two pairs of principal lines of like polarization coincide, and the intensity is at all points in the former case not greater than, and in the latter case not less than, it was before the introduction of the plate.
Their cult at an early date was united with that of Demeter and Kore, with the result that two pairs of Cabeiri appeared, Hephaestus and Demeter, and Cadmilus and Kore.
With 23 to 25 pairs of claw-bearing legs, four spinous pads on the legs, and nephridial openings of legs 4 and 5 in the middle of the proximal pad or on its proximal side; feet with two primary papillae, one anterior and one posterior; outer jaw with two, inner jaw with two or three minor teeth at the base of the main tooth, separated by a diastema from the row of small teeth; crural glands present in the male only, in the two pairs of legs preceding the generative opening; coxal glands present.
Both winged and wingless forms of both sexes occur, and the wings when present are normal in number, that is to say two pairs.
On the base there is a circle bisected by two pairs of horizontal lines forming an ' X ' shape.
With a crossover cable, two pairs of wires are reversed at one connector end.
Between the magazines were two pairs of gun casemates (to shelter the guns in) flanked by two pairs of artillery general stores.
Between the two Moncrief pits there are two pairs of open emplacements that mounted 68 pounder RML's.
The noise was left to two pairs of Mal lards takign flight and then flying overhead squawking madly.
Wasps are generally larger, have a clear wasp waist, and two pairs of wings.
The fact that there are two pairs of gonapophyses on the ninth abdominal segment would be fatal to the view that they are in any way homologous with legs, were it not that there is some evidence that the division into two pairs is secondary and incomplete.
As regards wing-structure, the Isoptera with the two pairs closely similar are the most primitive of all winged insects; while in the paired mesodermal genital ducts, the elongate cerci and the conspicuous maxillulae of their larvae the Ephemeroptera retain notable ancestral characters.
The simple nerve-ganglion or brain (g) lies on the anterodorsal side of the pharynx, and by its position determines the orientation of the animal, the cloacal opening lying on the same side, and the course of the gut being" neural."The sense organs are a pair of pigmented eyes (oc), and two pairs of antennae, one anterior proximal and near the wreath, the other distal and usually more or less lateral.
As in the following genera, there are two pairs of premolars, of which the first in this case is small and rounded, while the two series of cheek-teeth are nearly parallel (see SousLIK).
This machine had two pairs of cylinders, that is, two type or stereotype cylinders, and two others which gave the impression as the web passed between.
Then two pairs of Frenchmen approached the criminals and at the officer's command took the two convicts who stood first in the row.
There is a large winter gull roost and one or two pairs of redshank nest here - unusual so far from the coast.
Punch two pairs of binding holes about three inches apart along one side of one piece of cardboard.
These come in sizes up to 24 months, and the package of two pairs of socks costs just over $5, making it a reasonably good deal for two adorable pairs of socks.
One foot high, tufted, and spreading, the thin, wiry stems each carry two pairs of leaves on pedicels an inch long, and a terminal leaflet, all deeply notched.
The key is to look for closeouts and wholesale websites where you will save enough money to purchase at least two pairs of denim shorts for the price of one!
The company's main focus is on giving you two pairs of glasses and an eye exam for a surprisingly small cost.
Sample deals include two pairs of eyeglasses that are normally priced at $45.95 each plus an exam, all for $69.99.
Lined bifocals usually run $99.99 for the two pairs plus the exam.
Some people, however, vastly prefer how they look in contact lenses, the lightweight feel compared to frames, or they like to wear lenses for distance and put on reading glasses when necessary rather than juggling two pairs of frames.
Every designer, from Dolce & Gabbana to Fendi to Chanel is featured here, and what makes this site even more spectacular is that they don't just offer one or two pairs of eyeglasses.
Visionworks runs different promotions throughout the year, such as two pairs of eyeglasses for $99.00, one pair of prescription reading glasses for $29.00, and two pairs of no-line bifocals for $149.00.
These can be purchased for deals such as one pair for $12 or two pairs for $20.
They may sell a single pair for $12 or make a deal and offer two pairs for $20.
For every two pairs you order from this site, you get an extra pair for free, but they will never have a silver or black frame.
Also, for every two pairs you order here, you get a free pair.
Wearing two pairs of glasses might take a little bit of getting used to for some, but not much at all.
The extremely lightweight design of the Cocoons frames allows them to float comfortably over prescription glasses and you don't even feel like you are wearing two pairs of glasses.
For men who don't like to carry around two pairs of glasses--a pair with clear lenses and a pair with tinted lenses--there's a solution.
You still won't get stuck shuffling around two pairs of glasses walking to and from your car in a parking lot on a bright day, for example.
They tend to be lighter than you may think, but they also have a tendency to feel bulky until you get used to the sensation of effectively wearing two pairs of glasses.
For example, the BluBlocker website has a special offers section that features great deals when you buy two pairs of glasses.
No line bifocals give many the freedom from carrying two pairs of glasses and look like regular glasses so no one but you knows that you are wearing bifocals.
Located at the back of the mouth above and below the soft palate are two pairs of lymph glands.
If you've thought your list out well and decided that you only need, say, two pairs of slacks, two skirts, and four tops, you might forget and overbuy once you're at the store.
Travel Smith offers two pairs of swim shorts that may be of interest.
Stick with two pairs - one flat, strappy metallic in gold or bronze will be a universal fit for almost anything, and a low heel will suit dressier occasions and look great with a dress.
Place a tank top underneath and pair the top with colorful tight-fitting pants and two pairs of neon colored socks (hot pink and tennis ball yellow).
Some dancers buy two pairs of shoes at a time.
The first thing you need to know when you're choosing a new pair of walking shoes is that feet are like fingerprints--no two pairs are the same.
With bargains like these, you can afford two pairs of shoes for the price of one!
If you have financial concerns, limit your child to about two pairs of shoes per growth period.
You can also read customer comments on a specific shoe, which can be very useful when you can't decide between two pairs.
The classic rule for men's shoes is to have two pairs of black shoes to wear at the office and one pair each of semi-casual shoes - burgundy or oxblood for the colder months, honey or cognac for the warmer.
You might consider purchasing two pairs - one in your regular size and one size up or down, depending on the company's recommendations.
Many brides opt for two pairs of shoes for their special day, so you might consider turquoise shoes for your post-wedding festivities if you don't want to wear them during the ceremony itself.
One gal wanted to buy this one item for a hundred some dollars - I said 'you can buy two pairs of earrings and get that at half price'.
In fact, some squads use two pairs of cheer shoes each year; one pair for inside cheering and one pair for outside cheering.
If your squad does team workouts it's likely that at least one or two pairs will come with your uniform purchase.
And if you don't want to wear two pairs of stockings, you can get some ready-made this way.
With almost 800 styles from which to choose, your hardest decision may be just choosing one or two pairs of hipsters instead of indulging in a whole new lingerie wardrobe.
We also have a MegaPack that is $14.95, for two pairs each of the Narrow and Regular widths.
You don't need to wear two pairs of underwear with thick waistbands.
In the more typical Lemuridae there are two pairs of upper incisor teeth, separated by a gap in the middle line; the premolars may be either two or three, but the molars, as in the lower jaw, are always three on each side.
The maximum number of teeth is 36, there being typically two pairs of incisors and three of premolars in each jaw.
They consist of two rows of balls rolling in two pairs of V races or grooves.
In male beetles, however, the two pairs of genital processes (paramera) belonging to the ninth abdominal segment are always present, though sometimes reduced.
The head - carrying feelers, mandibles and two pairs of maxillae - is succeeded by the three thoracic segments, each bearing a pair of strong five-segmented legs, whose feet, like those of the adult, carry two claws.