The U.N.Security Council has imposed three rounds of sanctions on Iran for refusing to stop enriching uranium at home.

VOA: standard.2009.10.19

And if you're our zero just continue standing there awkwardly, Alright. So with that said, we have a three-letter word so we'll have three rounds of hands going up or down.

如果你代表0，就站在那里别动，好，那么，我们有三个字母的单词,因此我们分三次分别表达这三个字母。

哈佛公开课 - 计算机科学课程节选