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You should think twice about employing someone you've never met.

雇用素不相识的人应三思而行。

《牛津词典》

That will make him think twice!

那会让他三思而行！

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Wafaa from Egypt says his favorite proverb is, "Think twice,act wise."

VOA: special.2009.03.01

And in fact, one of the lessons you may already be realizing with P sets is that things seem to take twice, three times, four times longer than you actually might think.

从习题集中你可能已经得出的一个教训就是,程序所花的实际时间往往是你开始以为的两倍，三倍，四倍甚至更长。

哈佛公开课 - 计算机科学课程节选

Yeah, I get homesick at least twice a quarter, I think.

想，我每个季度至少想家两次。

想吃中餐的时候 - SpeakingMax英语口语达人

There's more news now that might make women think twice about hormone replacement therapy.

NPR: Breast-Cancer Drop Attributed to Less Hormone Therapy

This article originally appeared on www.fivecentnickel.com: Think Twice Before Rolling Over Your 401(k).

FORBES: Think Twice Before Rolling Over Your 401(k)

"Maybe not 100 storeys, maybe people will think twice about going over 50, " says Marco Goldschmeid.

CNN: Attack could alter future skylines