Our peers are the selection pressure as we struggle to pass our memes on to the next generation.

当我们努力将自己的基因传给下一代的时候，我们的同类就是这个“选择”的压力。

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Selection pressure for this efficient style of locomotion favored longer and more flexible spinal columns.

受天择压力，他们朝向耗能较少的移动模式演化，因而脊椎柱更长，更灵活。

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It is likely that the genes involved, which include genes that encode neuronal ion channels, have been subject to a positive selection pressure leading to an accelerated evolution of genetic changes.

与之其进化相关的基因，包括编码的神经离子通道的基因，可能受到了积极的选择压力，从而加速了基因变化的转变。

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The human population exploded and without natural selection pressure, fecundity in the types economic activity flourished.

FORBES: Lemin Wu, Economic Growth and Why Humanity Can't Have Nice Things

Of course, low genetic variation means that selection pressure is higher.

FORBES: The Science of Tequila (Snobbery)

This creates a selection pressure which drives the genes through the population, as the offspring of wild flies die more often than those of engineered or hybrid flies.

BBC: GM mosquito bid to tackle malaria