美语听力练习素材:奥巴马在拉丁美洲发表讲话

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例句：Congress passed the National Security Act, and the CIA was born.
国会通过了《国家安全法》，中央情报局由此而诞生。

2.counter-productive 产生相反效果的

例句：In practice, however, such an attitude is counter-productive.
然而，实际上这种态度只会适得其反。

3.climb down 爬下

例句：They began to climb down the mountain when it was dark.
天黑时他们开始从山上下来。

4.military coup 军事政变

例句：The monarch was ousted by a military coup.
那君主被军事政变者废黜了。