"I don't have to be concerned about the young dealers and gang-bangers coming in my house, because I believe now that they think twice."

VOA: standard.2010.06.29

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

"It is not a magic bullet, but it will at least force the Iranians to think twice about continuing to flout the will of the international community.,".

VOA: standard.2009.10.28

If I thought there was 2/3 probability they'd choose Left and 1/3 probability they'd choose Right, then I think it's twice as likely they're going to choose Left, and I could redo this calculation.

如果你觉得对手选左的可能性是2/3,而选右的可能性是1/3,即对手选左的可能性是右的2倍时,我们再重新计算一下

耶鲁公开课 - 博弈论课程节选

Despite signs of a gradually improving economy, job growth continues to lag in the U.S.Unemployment remains high at 10 percent after the economy shed another U.S.Chamber of Commerce President Thomas Donohue says the reason is obvious: uncertainty is causing large and small businesses to think twice before hiring new workers.

VOA: standard.2010.01.12

"He's been down there to my knowledge twice, but I don't think he's really done that much."

VOA: standard.2010.06.10