But, at the mean time, of cource, we've seen nuclear proliferation in North Korea and now in Iran.

但是，同时，我们目睹了朝鲜的核扩散问题,现在伊朗也存在同样的问题。

普林斯顿公开课 - 国际座谈会课程节选

there are terrorism that works, there are nuclear proliferation as I said.

恐怖主义仍在继续，还有我刚才说过的核扩散问题。

普林斯顿公开课 - 国际座谈会课程节选