铜参与机体代谢和某些酶的合成，直接影响动物的繁殖性能。
On the other hand, copper has a direct influence on the pregnant performance of animal, and also plays a role in central nerve system and immune system.
TTF - 1基因还对哺乳动物的繁殖性能有潜在的影响。
Mammalian reproductive ability also can be influenced potentially by TTF-1.
在食物短缺时，很多动物的繁殖情况很差，有时甚至完全不繁殖。
During a food shortage, many animals do not breed very well or, in some cases, at all.
大量证据表明环境激素可以干扰人类生殖健康和其他动物的繁殖能力。
Numerous evidences show that the environmental hormone can disturb the reproductive health of humankind and the multiplication of other animals.
此前的研究表明，动物的繁殖成功率会受到动物在生命早期阶段营养状况的影响。
Previous research has shown that the reproductive success of animals is influenced by nutrition early in life.
虽然研究人员承认研究中的雌蟒有可能是基因突变的怪物，但是他们认为生物学家们应该重新思考爬行动物的繁殖行为。
While researchers admit that the female in the study may have been a genetic freak, they say the findings should press researchers to re-think reptile reproduction.
鲸作为社会性动物，可能需要大规模聚集的刺激来诱导繁殖行为。
Whales being sociable animals probably need the stimulus of sizeable gatherings to induce reproductives behavior.
同样，如果一种植物或动物没有留下任何可以繁殖的后代，它就不能把所有的能量浪费在使自己变得更强壮上，因为这是最可能走向灭绝的方式。
Similarly, a plant or animal cannot squander all its energy on growing a big body if none would be left over for reproduction, for this is the surest way to extinction.
很多动物只在一年的某个时候交配繁殖。
生存和成功繁殖通常需要动物的活动与周围可预测的事件相协调。
Survival and successful reproduction usually require the activities of animals to be coordinated with predictable events around them.
尽管我们拥有追踪、捕获、保护和繁殖濒危动物的技术，但并不意味着我们真的应该这么做。
Even though we have the technology to track, capture, protect, and breed endangered animals, that doesn't imply that we should actually do it.
繁殖这些变形的、残疾的和容易患有疾病的动物是一件可怕而反常的事情，而我们对这一现实已经完全地麻木了。
We've become completely desensitise to the fact that breeding these deformed, disabled, disease-prone animals is either shocking or abnormal.
生物(植物、动物和人)都是通过“制造”与自己正相像的其他生物来繁殖。
Living things (plants, animals, and people) reproduce by making other living things that are just like them.
生物钟控制动物吃东西、睡眠及繁殖的时间：生物钟有助于动物适应四季的变化，这一点极其重要。
This clock governs when an animal eats, sleeps and reproduces: it is hard to overstate how important it is at helping animals adapt to changing conditions throughout the seasons.
大家都知道，很多动物在面对掠夺，压力或者直接威胁的时候，会繁殖得更快。
It has been known for a while that, in the face of deprivation, stress or direct threats, many animals embark on reproduction much quicker.
很多动物每天面临觅食、繁殖、社交等相关的抉择。
For many animals, each day consists of numerous decisions that pertain to eating, reproducing and socializing.
其次，有些濒临灭绝的珍稀野生动物应该收捕、人工喂养并繁殖。
Secondly, certain rare wild animals that are going to be extinct should be collected, fed and reproduced artificially. Finally, those who hunter them must be punished severely.
对人类而言，就像对大多数动物物种那样，雌性的身体状态对繁殖的成功非常重要。
In humans, as in most animal species, the state of the female body is very important for the success of reproduction.
在史前鱼类化石中发现的这类高级繁殖技术将会让我们对动物进化的理解发生重要影响。
The discovery of this kind of advanced reproductive technique among prehistoric fish fossils has important implications for our understanding of animal evolution.
世界上只有为数不多的几家动物园成功进行了象龟繁殖，而现在在我们的保温箱中，还有不少象龟蛋正在孵化。
There has only been a handful of zoos around the world that have had success with breeding this species and we currently have more eggs in the incubator.
这项研究的部分经费由美国国立卫生研究院资助，不断增加的动物研究表明BPA对机体有健康危害，包括繁殖和生长问题。
The study, funded partly by the National Institutes of health, joins a growing body of animal research showing the toxic health effects of BPA, including reproductive and developmental problems.
研究人员采用了四种不同试验找出公鸡与母鸡对繁殖成功率的影响---虽然野外动物的研究存在某些困难。
The researchers used four different experiments to separate out the influence of male and female factors on reproductive success -- something that is difficult to study in wild animals.
他们开始探索雌性动物竞争时是否产生了这些惊人的武器、角与繁殖力两者之间是否需要相关？
They set out to discover whether female competition accounted for these impressive armaments, and whether there was a trade-off between horns and fecundity.
人工饲养时他们几乎不可能繁殖——但是瑞士巴塞尔动物园的工作人员成功地再造了它们的自然条件，一批新的小型水母诞生了。
When captive they are incredibly difficult to breed - but staff at Basel Zoo, Switzerland, have managed to imitate their natural conditions and a new batch of tiny jellyfish have been born.
马尔萨斯个人认为富裕人群会生育更多子女，正如生物学家所说，动物繁殖数量会因食物的增加而增加。
Malthus himself thought richer people would have more children and, as any biologist will tell you, animal populations increase when there is more food around.
这种无脊椎动物以惊人的繁殖速度占领海洋，后分解为高浓度碳生物量，细菌难以有效吸收。
The invertebrates, populating the seas in ever-increasing numbers,break down into biomass with especially high levels of carbon, which thebacteria cannot absorb well.
这种无脊椎动物以惊人的繁殖速度占领海洋，后分解为高浓度碳生物量，细菌难以有效吸收。
The invertebrates, populating the seas in ever-increasing numbers,break down into biomass with especially high levels of carbon, which thebacteria cannot absorb well.
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