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BBC在线收听下载:美国宣布波多黎各进入紧急状态 以应对寨卡病毒传播

2016-08-15来源:BBC

短语讲解:

1. The US government has declared a public health emergency in Puerto Rico because of the outbreak of Zika virus.

because of 因为,由于
例句:All the planes were socked in yesterday because of the thick mist.
由于雾大,昨天所有的飞机都停飞了。

2. Medical authorities have warned that a quarter of the territory's population could be infected by the mosquito born virus by the end of the year.

by the end of 到…为止
例句:By the end of the game, the stadium was almost vacant.
到比赛结束的时候,体育馆几乎空了。