单词natural selection
na.: 天择
网络: 物竞天择；力矩
自然选择；物竞天择:
the process by which plants, animals, etc. that can adapt to their environment survive and reproduce, while the others disappear
自然淘汰,自然选择,天择
The finding that the gene has so many effects raises the question of which one was the dominant trigger for natural selection.
该基因有这么多方面的影响。这一发现引发了一个疑问，主要是哪方面的影响引发了自然选择？
For natural selection to favor one feature over another, "It doesn"t have to be an ideal solution, " she said.
大自然的进化意味着总要在两种特性之间做出选择，所以“未必这是最理想的解决方式，也没有必要，”她说。
If we were truly a result of evolution by process of natural selection, this value on human life seems as though it has no source.
如果我们真的是通过自然选择的过程进化出来的结果，那么人类生命的价值看起来是不能追溯到源头的。
Darwin himself, in his autobiography, tells the story of coming up with the idea for natural selection as a classic "eureka! " moment.
在他的自传里，达尔文讲述了自然选择的产生，作为一个典型的“发现！”
Although it does shield people from other forces, culture itself seems to be a powerful force of natural selection.
尽管确实为人类阻挡了其他力量，文化本身貌似是一个强大的自然选择力量。
Just how much a process like this can be shaped by natural selection is unclear.
仅自然选择到底能产生多少种类似进程，就仍未查明。
But that, too, has its difficulties. Just how much a process like this can be shaped by natural selection is unclear.
但这一说也有其困难，它在多大程度上收到自然选择的影响，目前尚不清楚。
What he did not realize was just how seriously Germany was taking the idea of "natural selection" .
他意识不到的是德国对“自然选择”这个想法有多认真。
Why not copy these proven models, the engineers wondered, rather than trying to outguess 4 billion years of natural selection?
工程师想知道为什么不复制这些行之有效的生物原型，而偏偏费力地去猜测40亿年的自然选择。
Such an accelerated rate of evolution might be due to factors other than natural selection, in particular GC-biased gene conversion.
这种加速进化可能是由于自然因素以外的其他选择，特别是气相色谱偏向基因转换。