鸭嘴兽（Ornithorhynchusanatinus）是仅有的两种卵生的哺乳动物之一，另一种为食蚁兽（spiny anteater），它产卵。
The platypus (Ornithorhynchus anatinus) is one of only two mammals, the other is the echidna (spiny anteater) that lays eggs.
其基因也包括了卵生和哺乳的部分。
The genome also included sections of DNA linked to egg-laying and others for lactation.
鸟类、爬虫及昆虫是卵生的。
鸟类、鱼和两栖类是“卵生”的动物。
哺乳动物繁衍后代时不是卵生，而是胎生。
日行性，卵生。体色会随环境的不同而改变。
Active in daytime; oviparous; body color changes according to the environment.
对哺乳动物来说，卵生和长有毒刺是很少见的。
It is very unusual for a mammal to lay eggs or to have poisonous spurs!
它们也是卵生的。
鸟是卵生动物。
针利用富黏性的长舌捕食蚂蚁，它与鸭嘴兽是仅存的卵生哺乳类动物。
He echidna USES its long sticky tongue to catch ants. The echidna and the platypus are the only existing egg - laying mammals.
如今，这种怪诞但迷人的生物被命名为鸭嘴兽，现存的五种卵生哺乳动物之一。
Today, this bizarre but fascinating creature is known as the platypus, one of only five extant monotremes (egg-laying mammals).
鱼龙和鲸类的另一点相似在于：不像其他目前存活的卵生爬行类，他们胎生生下后代。
Ichthyosaurs also resembled cetaceans in another way: unlike most living reptiles, which lay eggs, they gave birth to live young.
雌性蛋白包括卵黄蛋白和卵黄蛋白原，是卵生类动物早期生命阶段中主要的营养物质来源。
Female specific proteins, containing vitellin (Vn) and vitellogenin (Vg), are main nutrition resource in early stage of life for oviparous animals.
大多数家庭的排卵测试确定在你的周期检测促黄体激素激增(LH)的触发排卵生育峰值2天。
Most home ovulation tests identify the 2 Peak Fertility days during your cycle by detecting the surge in Luteinizing Hormone (LH) that triggers ovulation.
鸡被作为卵生动物的代表，一些已经灭绝的爬行动物可能在进化过程中将基因传给了鸭嘴兽和其他哺乳类。
Chickens were included to represent egg-laying animals, such as extinct reptiles, that passed on much of their DNA to the platypus and other mammals in the course of evolution.
如果我们只看字面意思问题就变得很简单了，卵生动物在鸡类之前很早就出现了，所以技术上讲是蛋先于鸡。
The question would be simple if we took it literally, egg laying animals existed far before chickens came about, So technically the egg came before the chicken.
值得注意的是，接受数量考察的都是卵胎生种类（另外一些种类，比如蟒蛇，则是卵生）以及静候捕猎的种类，这会让他们更容易受到环境变化带来的影响。
Notably, the snake populations studied all give birth to live young (other species like pythons, lay eggs) and are sit-and-wait predators, making them more vulnerable to change in their environments.
鸭嘴兽(Ornithorhynchusanatinus)是仅有的两种卵生的哺乳动物之一，另一种为食蚁兽（spiny anteater）。
The platypus (Ornithorhynchus anatinus) is one of only two mammals — the other is the echidna (spiny anteater) — that lays eggs.
鸭嘴兽(Ornithorhynchusanatinus)是仅有的两种卵生的哺乳动物之一，另一种为食蚁兽（spiny anteater）。
The platypus (Ornithorhynchus anatinus) is one of only two mammals — the other is the echidna (spiny anteater) — that lays eggs.
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