VOA慢速英语:Seeking to Secure All Nuclear Materials in Four Years

1.All this, in turn, requires something else, which is something more fundamental. It will require a new mindset -- that we summon the will, as nations and as partners, to do what this moment in history demands."

in turn相应地；转而

依次, 轮流地
 
例句：They answered the teacher's questions in turn.
      他们依次回答了老师的问题。

to do what this moment in history demands，后面是what引导的宾语从句。

2. It promised to give up all of its highly enriched uranium by two thousand twelve.

give up放弃;投降， 认输; 猜不出

例句：I can't answer that puzzle; I give up.
      我猜不出这个谜语, 我认输了。

      She will give up this journey.
      她将放弃这次旅行。

3.The United States Senate and Russia's parliament must both approve the agreement for it to take effect.

take effect生效, 奏效

例句：The prescribed medicine failed to take effect.
      医生开的药没有见效。

4.The Obama administration is pushing for a new U.N. resolution with actions against Iran.

push for急切、强烈地要求, 为…奋力争取

例句：People living near the airport are pushing for new rules about night flight.
      住在机场附近的人们正强烈要求制订出夜航班机的新规。

      He pushed me for an answer.
      他催我作出答复。

5.But he also said his country was willing to deal with a plan that protects Iran's rights, includes its independence and leaves out the nuclear issue.

leave out遗漏, 省略, 删去; 未顾及, 忽略

例句：He left that part of the speech out.
      他把讲话中的那部分删去了。

      She left out an important item in her account.
      她的账目漏掉了一个重要的项目。