因?yàn)?/c>這會(huì)使它們處于易受捕食者攻擊的境地。
If you think the mating rituals at your local singles bar are strange, ha-ha! Wait till you get a load of black widow spiders!
如果你認(rèn)為本地酒吧單身人士的約會(huì)習(xí)慣很奇怪,哈哈!等到你看到黑寡婦蜘蛛再說!
They decide whether a woman would be a good mating partner in milliseconds, much quicker than was previously thought.
而此次研究發(fā)現(xiàn),男人在幾毫秒內(nèi)就可判斷一個(gè)女人是否是自己的理想伴侶,時(shí)間遠(yuǎn)遠(yuǎn)快于此前的設(shè)想。
Across the animal kingdom, when males see other males mating, it tends to provoke arousal.
在動(dòng)物界,當(dāng)雄性看到其它雄性交配時(shí),就會(huì)喚起性欲。
These true seals have a highly polygynous mating system, with a successful male able to impregnate up to 50 females in one season.
這些無耳海豹是高度一夫多妻制的交配體系,一只勝利的雄性海豹一個(gè)季度能夠使50只雌性海豹受孕。
Fatu, at least, isn't waiting for such breakthroughs: in January this year, she began mating with a male named Suni.
至少,Fatu不是在等這樣一個(gè)突破:今年一月份,她開始一頭名為Suni的雄性犀牛交配。
Cases are known where trioecy or, more generally, heteroecy, provides for an optimal mating system.
眾所周知,單全異株,或者更通俗一些說,雌雄雜生為最適交配打下基礎(chǔ)。
So the investigators speculate that males might synchronize to a single common pitch as a sort of mating beacon.
因此科學(xué)家們推測雄性藍(lán)鯨們也許會(huì)一致地發(fā)出同一種單一頻率的叫聲作為求偶的信號(hào)。
Fungi have two or more mating types, and only cells of different mating type combine to produce diploid cells.
真菌有兩個(gè)或兩個(gè)以上的交配類型,只有細(xì)胞的不同交配型相結(jié)合,產(chǎn)生二倍體細(xì)胞。
They're just doing the mating dance now, both sides waiting to see if the money is right.
他們只是做交配舞蹈現(xiàn)在,雙方都等著看,如果資金是正確的。
Shooting takes place for just a few months every year outside of mating season.
狩獵活動(dòng)每年只在繁殖季以外的幾個(gè)月進(jìn)行。
As you can tell from the frog song recording, the mating calls of this species include a whine followed by a series of grunts, or "chucks. "
正如你從上面那段錄音中聽到的,這種動(dòng)物求偶的鳴音由“嗚嗚”聲和一連串“咕嚕”聲組成。
We found a drastically reduced refractory period in females if the first mating partner was infected.
我們發(fā)現(xiàn)了一個(gè)大大減少不應(yīng)期女性,如果是第一次交配伙伴感染。
This may be one of the strangest looking birds ever. This male bird spreads his wings in a mating ritual, hope to attract a female.
這可能是有史以來最奇怪的鳥之一。公鳥在交配儀式中展開他的翅膀,希望能夠吸引母鳥。
The cause of rolling resistance is the deformation of mating surfaces of the rolling element and the raceway on which it rolls.
輾壓抵抗的原因是滾動(dòng)元件和滾道在其軋輥上的齒合表面的變形。
Male worms die after mating inside their human hosts; females grow ferociously , averaging almost an inch a week.
雄性蠕蟲在人體內(nèi)與雌蟲交配后就死了,雌蟲則瘋狂地長大,大約一周能長一英寸。
Males that stick close to females are savvy guards, chasing away other would-be suitors, claiming more mating opportunities for themselves.
那些靠近雌性的雄性是精明的保衛(wèi)者,它們攆走其他可能追求其配偶的蟋蟀,使自己獲得更多的交配機(jī)會(huì)。
Another belief on its origin is the beginning of the birds mating season during the Middle Ages.
另一種說法起源于中世紀(jì)時(shí)期關(guān)于鳥類的交配季節(jié)的開始。
The Magdeburg hemispheres were a pair of large copper hemispheres with mating rims.
馬德堡半球是帶有匹配邊緣的一對銅半球。
They make that decision on whether a woman would be a good mating partner in milliseconds.
他們往往在幾毫秒之內(nèi)就能決定一個(gè)女性是否是一個(gè)合適的求偶對象。
Before two components are assembled together, the relationship between the dimensions of the mating surfaces must be specified.
在安裝組合之前,兩個(gè)部件相交的面積尺寸之間的關(guān)系必須被確定下來。
males and females come together only at mating time, to share a kill, or to drink and rest at watering holes in areas with limited water.
男性和女性只有在交配時(shí)間一起受到的影響,分享殺,或在和有限制的水區(qū)域中的酒店喝而且休息。
It is always in a male's interest to try to stop a female mating again.
設(shè)法阻止雌性個(gè)體再次交配,對雄性個(gè)體總是有好處的。
This oil film separates the mating surfaces and appreciably reduces the friction between them.
這層油膜將配合面分離開來,明顯降低了配合面之間的摩擦。
It is, moreover, a process that could apply equally to the sperm of putative fathers who were starved around the time of mating.
況且,對于那些交配期間饑餓的父親來說,這種過程同樣適用于他們的精子。
Second, the mating surfaces must be either on the edge or the surface of a board.
第二,拼合的部位必須要么是板子的側(cè)邊,要么在板子的大面上。
Friction alone between the mating parts of the assembly shall not be acceptable as a means to prevent turning.
利用兩配合部件之間的摩擦來作為防止扭轉(zhuǎn)的一種方式是不能接受的。