研究发现，押韵可以让记东西更简单——这就是为什么孩子们在会阅读之前就能记住不少书的原因。

Studies have found that rhyming makes it easier to remember things—which is why toddlers can memorize some books before they can read them.

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研究人员发现毒液甚至在蛇出现之前就已经进化出来了，大约在一亿年前。

The researchers found that venom evolved before snakes even existed, about a hundred million years before.

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研究人员还指出，在我们发现幸福感开始下降之前，在2013年出现最急剧的幸福感下降之前，经济衰退就已经出现了。

The researchers also note that the recession hit some years before we see the beginning of the wellbeing drop, and before the steepest wellbeing decline, which occurred in 2013.

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