It stuck, because natural selection favors new traits that give their owners a survival advantage.

它能被保存下来是因为自然只选择那些有生存优势的新特点。

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Now at version 5, Preview has undergone numerous improvements over time, but its Annotations toolbar, easy selection of columns, and image editing capabilities emphasize its advantage for users.

目前版本5的预览，随着时间的推移虽经历了无数次改进，但它的注释工具栏、专栏的简易选取以及图像编辑能力强调了作为其使用者的优点。

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The best guesses are that feathers evolved either for insulation (as fur did in mammals) or for display, and that natural selection took advantage by turning them into a means of transport.

对此最好的猜测便是，羽毛的出现要么是为了护身(就像哺乳动物的毛皮)，要么就是为了作秀；此外，自然选择就择优而把某些动物的羽毛变成了它们的交通工具。

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Though the genes in question have yet to be identified, this result suggests they are too abundant to be there by chance in other words they are being kept in the population by natural selection because psychopathic behaviour confers a selective advantage.

ECONOMIST: Evidence that psychopaths are born, not made

If you are sloppy with selection or execution you will fritter away the ETF cost advantage.

FORBES: Magazine Article

Or just swing in for a cup of coffee and take advantage of its sprawling, outdoor seating and ample board game selection to pass the night away.

BBC: A vegetarian in Texas