They lay eggs that incubate through the winter.
它们产下卵，要孵化整个冬天。
它们下蛋——很大的蛋。
They lay eggs along the way and die.
它们途中产卵，然后死去。
他们下蛋吗？
Some of the fish are fertile, for they lay eggs.
一些鱼多产是因为它们孵卵。
If insects paid attention to such advertisements, they might be prompted to lay their eggs on a duller, and presumably less resistant host.
如果昆虫注意到这样的广告，这可能会促使它们将卵产在一个更迟钝、据推测更不会抵抗的寄主上。
Fishes are caught when they are on the way upstream to lay eggs.
鱼群在前往上游产卵的途中被捕获。
They dig out nests in the riverbed and lay their eggs.
它们在河床上挖巢产卵。
However, they are, in one respect, less fully given back to the water than whales or dugongs, for turtles still lay their eggs on beaches.
然而，从某种程度上讲，海龟并没有像鲸鱼或儒艮一样完全回到水中生活，因为它们依旧在海滩上产卵。
They have developed special chickens that lay eggs with drugs inside.
他们培育出了一种特殊的鸡，这种鸡下蛋时体内含有药物。
Ichthyosaurs also resembled cetaceans in another way: unlike most living reptiles, which lay eggs, they gave birth to live young.
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。
Cuckoos would have good reason to do so, since the warblers and other small birds in whose nests they lay their eggs are understandably frightened of hawks, and give them a wide berth.
杜鹃有很好的理由去模仿鹰，由于莺和其它的小型鸟类在它们的巢中产卵，自然这些小型鸟类就很害怕鹰，并且对鹰敬而远之。
Humanely raised hens will be healthier as they will have room to move around in addition to being less susceptible to disease, and will therefore lay healthier eggs.
人道“饲养的鸡染病的几率会减小，而有活动空间的鸡会更健康，则会产下更健康的鸡蛋。”
After nine months of service, they are typically euthanized because they can no longer lay 'optimal eggs,' Mr. Robinson said.
在服务满9个月之后，这些母鸡通常会被执行安乐死，因为它们再也不能产下“最优质的鸡蛋”了，罗宾逊表示。
Even then, they only lay eggs about every five years.
即便性成熟了，它们也是每隔五年才产卵一次。
After a few years building up strength, they swim back to the beaches were they were born to lay up to 150 eggs at a time in holes dug in the sand.
几年过去了，它们的力气增强了，他们便游回了他们的出生地，在那里繁衍下一代，他们一次可以产下150个蛋，然后挖个洞把这些蛋埋在沙子里。
And that puts them somewhere between mammals and reptiles, because they still maintain quite a lot of reptilian characteristics that we've lost, for instance they still lay eggs.
鸭嘴兽介于哺乳类与爬行类之间，因为它仍然具备许多爬行动物的特征，如产卵，而这些特征在我们身上已经消失了。
From Jenny's looks, it is still a rooster, but the fact that it could lay eggs confused FAO experts, and they are working hard to understand the phenomenon.
詹尼的外貌还是公鸡的样子，但是它却会生蛋和孵蛋。此事让联合国粮农组织的专家感到不解，正在研究詹尼变性的原因。
They produce, store, and release eggs into the fallopian tubes in the process called ovulation (pronounced: av-yoo-lay-shun).
卵细胞在卵巢处产生和存储，在排卵过程中，卵巢将卵细胞释放到输卵管中。
They lay their eggs on the inside of the pitchers, and tadpoles grow up swimming in the tiny pools of rainwater that collect in the bottom of these plants.
它们把卵产在猪笼草内。蝌蚪在猪笼草内由雨水聚集而成的小水池中生活。
Seriously , though. I thought hens are one of the best animals . why ? Because they can lay eggs.
言归正传，我认为母鸡是最好的动物之一。为什么？因为它会下蛋。
After a breeding year - during which they can lay up to 1,000 eggs - they head back to the feeding grounds for another few years to build up their reserves before returning to the nesting beaches.
经历了一个繁殖期，他们有的可以产下1,000颗蛋，它们就游回了它们的觅食区，在那里生活了一些年，为回到筑巢的沙滩储备能量。
They are very useful because they lay the eggs, but I don's like them very much.
虽然它们下蛋，很有用，但是我一点也不喜欢它们。
They can travel long distances to lay their eggs so the snake may not seem to have many but there will soon be more.
他们可以长途跋涉奠定他们的鸡蛋，使蛇未必似乎有很多，但有很快将更多。
These mosquitoes lay their eggs on moist soil in the marshes, but they won't lay them on standing water like many other species.
盐水沼泽地的蚊子把自己的腿埋在沼泽地潮湿的泥土中，而不是像其它蚊子那样把腿放在水面上。
它们会下蛋。
Mammals don't lay eggs. They give birth to live babies.
哺乳动物繁衍后代时不是卵生，而是胎生。
Mammals don't lay eggs. They give birth to live babies.
哺乳动物繁衍后代时不是卵生，而是胎生。
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