in both groups: the 250 here versus 250 here, which is significant sample size.

在这两组之间，样本规模相同的两组间。

哈佛公开课 - 幸福课课程节选

there were 250 kids who got nothing, who were also studied, 250 kids in the control group.

有另外250个孩子，他们什么也没得到，也列为了研究对象，250名对照组的孩子。

哈佛公开课 - 幸福课课程节选

The piece of paper you have here is 250 names chosen randomly from a Manhattan phone book.

你们手上的那张纸有250个名字,都是从曼哈顿电话薄里随机挑出来的。

耶鲁公开课 - 心理学导论课程节选

You need to do better than that to get the two hundred and fifty dollars.

想要卖到250美元,我们得想个更好的名字

耶鲁公开课 - 博弈论课程节选

And after a while,somewhere the name spreads and by the time I'm 250 years old, everybody's calling me Jo-Jo.

一段时间之后这个名字传开，当我250岁时，大家都叫我Jojo了。

耶鲁公开课 - 死亡课程节选