These noxious substances limit caterpillars' growth and reduce the number of eggs that female moths lay.
这些有毒物质会限制毛毛虫的生长，减少雌蛾产卵的数量。
The fish lay thousands of eggs at one time.
这种鱼一次产卵数千个。
The narrow strips of beach on which the turtles lay their eggs are being squeezed on one side by development and on the other by the threat of rising sea levels as the oceans warm.
海龟产卵的狭长海滩一边受到开发的挤压，另一边受到海平面上升的威胁，因为海洋变暖。
Where 50-kilogram king salmon once fought their way up waterfalls to lay their eggs in gravel beds, there now are only concrete walls holding back still water and deep beds of muddy deposits.
50公斤重的大马哈鱼王曾经奋力爬上瀑布，把卵产在砾石床上，现在只有混凝土墙挡住静止的水和深深的泥床。
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。
A battery chicken will lay six eggs a week. She might cost the equivalent of 150 eggs to feed, producing an annual net gain of 150 eggs.
笼养的鸡每周下6个鸡蛋，喂养它耗费的成本大约相当于150个鸡蛋的价值，每年可以净得150个鸡蛋。
Female crocs lay their eggs in clutches of 20 to 60. After the eggs have incubated for about three months, the mother opens the nest and helps her young out of their shells.
鳄鱼妈妈一次可以产卵20- 60个，经过3个月的孵化，鳄鱼妈妈就会打开巢穴的掩埋物帮助小鳄鱼顺利破壳。
A free-range hen scratching around might lay one or two eggs a week. Feeding her costs nothing, giving a net gain of 50-100 eggs a year.
散养的鸡四处抛食，一个星期可以下1-2个蛋，饲料成本为零，一年可以净得50—100个鸡蛋。
Cuckoos lay their eggs in other birds' nests, fooling them into believing the chick is one of their young.
杜鹃将卵产在其他鸟类的巢，欺骗其他鸟类相信小杜鹃是他们的孩子。
Ladybugs lay their eggs in clusters or rows on the underside of a leaf, usually where aphids have gathered.
瓢虫在树叶的背面成片或成排的产卵，通常也是蚜虫聚集的地方。
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。
Hundreds of thousands of birds lay their eggs on the island.
这个岛上有成千上万只鸟类在产卵。
I now understand better the force of the term "treading on eggshells", for greyish chicks and speckled eggs lay everywhere, easily overlooked on the guano-spattered rocks.
我更能理解这些燕鸥们是“踩在蛋壳”上的，因为淡灰色的小鸟和有斑点的鸟蛋到处都是，在溅着鸟粪的岩石上也可以轻易看到。
Only nowadays all the cocks are cackling and pretending to lay eggs, and all the hens are crowing and pretending to call the sun out of bed.
只是如今所有的公鸡都咯咯叫，假装会下蛋，所有母鸡都喔喔啼，假装叫太阳起床。
What a waste for a frog to lay so many thousands of eggs for just a couple of juvenile offspring!
青蛙一次产出成千上万只卵，只为了少数几个子代成蛙，这是多么大的浪费！
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。
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。
The British Trust for Ornithology found that, in the period 1971-1995, 51 species of birds tended to nest and lay eggs earlier (around a week or more on average) as background temperatures increased.
英国鸟类学信托基金会(The British Trustfor Ornithology)发现，在1971- 1995年期间，由于背景温度升高，51种鸟倾向于提前筑巢下蛋(平均约一周或更长时间)。
Each spring nearly a million puffins arrive at the cliffs of Scotland's west coast to lay their eggs.
每年春天有近100万只角嘴海雀会来到苏格兰西海岸的悬崖峭壁去产卵。
One reason for it is that around Easter time the rural household had plenty of eggs handy. The hens began to lay eggs again in the spring.
其中一个原因也许是，随着春天的来临，鸡开始下蛋的。在复活节前后，农户手里有许多鸡蛋。
All turtles, even those that spend most of their lives in water, lay their eggs on land.
所有的海龟，甚至那些大部分时间都生活在水中的海龟，都在陆地上产卵。
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。
In this season the swallow back in people under the eaves of stolen the frogs lay eggs in the water at night call.
在这个季节燕子回来了在人的屋檐下做窃青蛙在水中产卵一到晚上不停的叫。
Thousands of turtles frag themselves onto the beach and lay their eggs in the sand.
成千上万的海龟爬上沙滩，把蛋产在沙子里。
Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.
把很多但下到宿主的蛋上面的方法，黄蜂从这经验中学习下蛋法。
The mosquitoes mostly live on flower nectar, but the female of the species needs a meal of human blood to have enough protein to lay her eggs.
蚊子大多以花蜜为生，但是雌性蚊子为了产卵，需要吸人血来提供充足的蛋白质。
The mosquitoes mostly live on flower nectar, but the female of the species needs a meal of human blood to have enough protein to lay her eggs.
蚊子大多以花蜜为生，但是雌性蚊子为了产卵，需要吸人血来提供充足的蛋白质。
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