慢速英语:US Weighs Options as Islamic Militants Advance

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短语讲解：

1. As many as 40,000 people are reported trapped on a mountaintop in northern Iraq.

as many as 和…一样多; 不下于
例句：They drew as many as four times that year. 
他们那一年四次打成平局。 

2. A State Department official said the U.S. is looking at a number of possible actions and “actively considering” what else it can do.

a number of 许多的; 一些
例句：Difficulties arise in a number of ways. 
难度表现在许多方面。 

3. A United Nations tribunal in Cambodia sentenced two former Khmer Rouge leaders to life in prison.

in prison 坐牢
例句：If convicted, he faces up to four years in prison.
如果该罪名成立的话，他将入狱四年。

4. The court ruling came more than 35 years after the fall of the Khmer Rouge.

more than 多于
例句：Rob likes apples more than bananas. 
罗勃对苹果比对香蕉还喜欢。