BBC news 2009-07-04 加文本

1.It does not ask the 30 states that signed up to the International Criminal Court to end their relationship with it.

sign up签约

例句：It would be better for you to sign up for blanket insurance coverage.
      你最好签一份综合保险协议。

2.She's spoken emotionally and without notes, offering no single clear reason for stepping down and acknowledging that her decision was, in her words, “unconventional and not so comfortable”.

step down走下, 逐步减低, 辞职, 下台

例句：The revolutionary force forced the emperor to step down.
      革命军催迫皇帝退位。 

3.The official said the agreement, which will open up a vital new supply corridor for U.S. operations, will be formally announced during President Obama’s visit to Moscow next week.

open up展开, 给...开刀, 打开, 开发, 开办, 展示, 开始

例句：It is a modern businessmen's manner to open up new management channels and develop foreign and domestic trade widely.
      广拓经营渠道，广做内外贸易，这就是现代商人的气派。

4.The OAS Secretary-General arrives in the country which is becoming dangerously polarized as this political crisis drags on.

drag on拖延

例句：The meeting seemed to drag on for hours.
      会议似乎是拖拖拉拉地开了好几个小时。