这种鸟雄性比雌性更加色彩艳丽。
雄性动物热情地守护它们的交配对象。
雄性信天翁参与孵卵。
雌性与一雄性配对时，雌性不允许其他雄性与其交配。
During the time she is paired to a male, the female allows no other males to copulate with her.
雄性动物的求偶有点大肆声张的，他们要大力炫耀自己。
Courtship is somewhat vocal with a lot of displaying by the male.
如果雌性企鹅下蛋，所有的雄性企鹅都会筑巢。
All the male penguins will build nests if the female penguins lay eggs.
雄性雷射鸟在求爱时会同时利用这两种信号模式。
The male riflebird exploits both of these modes of signaling simultaneously in his courtship display.
在这些物种中，受精卵发育为雌性，未受精卵发育为雄性。
In these species, fertilized eggs develop into females and unfertilized eggs into males.
最可能遭受黑寡妇叮咬危险地动物当属昆虫以及雄性黑寡妇。
The animals most at risk from the black widow's bite are insects and male black widow spiders.
我们在研究中发现，在繁殖方面，严寒会削弱雄性的交配表现。
In studies, we found that when it comes to reproduction, freezing diminishes the mating performance of males.
巢里的那些恐龙可能是成年雄性，不会需要用来制造蛋壳的钙。
Those dinosaurs on the nests were probably adult males who wouldn't have needed calcium for making eggshells.
雌性鸟类与雄性鸟类有相同的图案，但是雌性鸟类的颜色更暗淡一点。
The female birds have the same pattern as the males, but they are a little duller in color．
在一项实验中，雄性草原田鼠服用了一种抑制抗利尿激素作用的药物。
In an experiment, male prairie voles were given a drug that suppresses the effect of vasopressin.
可能是雄性可以利用稀少的类胡萝卜素进行免疫防御和解毒，或者吸引雌性。
It may be that males can use scarce carotenoids either for immune defense and detoxification or for attracting females.
雄性鹿角蝇也做同样的事情，只不过它们用鹿角互相头撞头——以赶走竞争对手。
Male antler flies do the same, except they use their antlers to head-butt each other—to see off rivals.
它们确实会接触到雌性美洲鳄，然后雌性美洲鳄会去寻找雄性美洲鳄并与其交配。
They do reach the female alligator, who then goes to find and mate with the male.
在第一种情况下，雄性竞争和性内选择产生相对简短的鸣声，主要用于地盘行为。
In the first, male competition and intrasexual selection produce relatively short, simple songs used mainly in territorial behavior.
十年后的另一项研究报告称，成年雄性白尾鹿在即将发情和发情期间会摩擦前额。
A decade later another study reported that adult male white-tailed deer exhibited forehead rubbing just before and during the rut.
对几种动物的研究表明，在选择配偶时，雌性更喜欢鲜艳的类胡萝卜素着色的雄性。
Studies of several animal species have shown that when choosing mates, females prefer males with brighter carotenoid-based coloration.
由于这项研究，研究人员现在坚信，这些鸟类的雄性养育行为可能起源于恐龙的行为。
Researchers now believe, because of this study, that the male parenting behavior of these birds might have its origins in the behavior of dinosaurs.
最重要的是，与人类中的女性一样，比起雄性，她们往往更关注“商品和服务”的价值。
Above all, like their female human counterparts, they tend to pay much closer attention to the value of "goods and services" than males.
当雌性牛鹂被单独养在隔音的房间里，听到雄性歌声的录音，它们就会表现出求偶行为。
When female cowbirds raised in isolation in soundproof chambers were exposed to recordings of male song, they responded by exhibiting mating behavior.
当把雌性牛鹂单独养在隔音的房间里，让它们听到雄性的歌声，它们就会表现出交配行为。
When female cowbirds raised in isolation in sound-proof chambers were exposed to recordings of male song, they responded by exhibiting mating behavior.
例如，苏铁的雄性圆锥体会脱落近100立方厘米的花粉，其中大部分可能是被风吹散的。
The male cone of Cycas circinalis, for example, sheds almost 100 cubic centimeters of pollen, most of which is probably dispersed by wind.
他试图教一只叫巴斯的雄性海豚和一只叫桃瑞丝的雌性海豚隔着一道坚固的屏障互相交流。
What he tried to do was to teach a male dolphin called Bass and a female called Doris to communicate with each other across a solid barrier.
一只雄性天堂鸟可能会在最佳的场合中展示他华美的羽毛使自己成为关注的焦点，从而吸引雌性。
A male bird of paradise may put himself in the limelight by displaying his spectacular plumage in the best stage setting to attract a female.
为了获得有关唱歌能量消耗的经验数据，托马斯研究了鸣声率与雄性夜莺在夜间的体重变化之间的关系。
To obtain empirical data regarding the energy costs of singing, Thomas examined the relationship between song rate and overnight changes in body mass of male nightingales.
他们看到，如果雌鱼吃了对虾——即使是在这个陌生的实验室环境中——雄性裂唇鱼也会惩罚或驱赶雌鱼。
They saw that the male cleaner fish — even in this unfamiliar lab setting — would punish or chase away the female fish if the females ate a prawn.
这对姐妹，加上另一只叫泰迪的雄性负鼠，经由丹麦的一家动物园抵达这里，并将于7月1日首次公开亮相。
The sisters, plus a third male opossum called Teddy, arrived via a zoo in Denmark, and will make their public debut on July 1.
只有当母老虎在保护自己的幼崽时，或者当公虎在保护母老虎不受其他雄性动物的注意时，它们才会殊死搏斗。
Tigers fight to death only when a tigress is defending her young, or when a tiger is guarding a tigress from the attentions of other males.
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