Such a genetic tweak would ordinarily be winnowed out by natural selection over subsequent generations.

这样的基因变异通常会在后代的自然选择中被淘汰掉。

The people who have brains and courage come through and the ones who haven't are winnowed out.

那些有头脑有勇气的人要以通过这种动，而那些没有头脑和勇气的就将被淘汰掉。

A wise king winnows out the wicked; he drives the threshing wheel over them.

智慧的王簸散恶人，用碌碡滚轧他们。

When a king sits on his throne to judge, he winnows out all evil with his eyes.

王坐在审判的位上，以眼目驱散诸恶。

Those that haven't are winnowed out.

没有勇气的就被淘汰。