人类的本能欲望是生存并通过繁衍继续存在。
To live and to continue life through propagation are the two instinctive desires of human.
繁衍过后，多数鲑鱼会因精疲力竭而死。
动物的买卖主要是基于它们的遗传基因和繁衍历史。
Animals are bought and sold on the basis of their genetics and breeding history.
这个火红的星球甚至可能曾有利于生物的繁衍。
生存和繁衍是进化的两大基石。
Survival and reproduction are the two cornerstones of evolution.
神使他们按照各自的种类繁衍。
正是这才使人类得以繁衍生息。
生物能够生长，并能繁衍后代。
兔子有充足的食物就会繁衍得很快。
他们认为他们的行为主要是为了繁衍。
They believe that their behavior is primarily for procreation.
由共同的祖先繁衍而来的人。
饮食是人类生存和繁衍的首要物质基础。
Diet has always been the capital material foundation of humans' survival and reproduction.
寻找合适的配偶是实现繁衍的必要条件。
Seeking for an appropriate mate is essential for the reproduction.
在远古时代，就有人类在这里繁衍生息。
There has been human habitation here since prehistoric times.
哺乳动物繁衍后代时不是卵生，而是胎生。
有些鸟类也发觉在南部地区繁衍更为艰难。
雌性的主要目的是生产能够继续繁衍下去的后代。
Her major goal is to produce young that will live long enough to reproduce themselves.
咖啡树繁衍生息，到1726年，人们终于迎来了第一次收获。
It grew, and multiplied, and by 1726 the first harvest was ready.
我们可以看到一些稀有的濒临灭绝的物种在这里繁衍生息。
We can see a number of rare and endangered species breeding here.
这些食物，对于绦虫来说，是供给成长和繁衍唯一的能量来源。
This food is the tapeworm's only energy source for growth and reproduction.
结婚对于一个男人来说是一项重要的责任，家族的血脉得以繁衍。
Getting married was seen as an important responsibility for a man, so the family line could continue.
随着一代一代的繁衍，就算最骇人的事情都会在人文记忆中逐渐褪去。
From one generation to the next, even the most horrible events fade from cultural memory.
由于这种进化，该个体能够捕食到更多猎物并养活更多后代，它因此能迅速繁衍。
By enabling that individual to catch more prey and feed more offspring, it spread quickly.
男性的这些表情特征可能表明他们拥有较高的地位，这在繁衍后代方面是很有利的。
It could signal high status, which would be adaptive in terms of mating.
男性的这些表情特征可能表明他们拥有较高的地位，这在繁衍后代方面是很有利的。
It could signal high status, which would be adaptive in terms of mating.
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