英音听力讲解:美国设立六个商用无人机测试点

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短语讲解：

1. He told the BBC that the final stroke came when security forces beat up supporters who were distributing an open letter from him against the president.

beat up 搅拌; 搅匀（某物）; <美俚>痛殴; 毒打（某人）
例句：You nickname all the girls you beat up?
你给所有揍过的女孩取绰号?

2. It looks as if the security forces opened fire on many youths armed just with machetes and sticks, leaving corpses on the streets of Kinshasa.

as if 好像， 似乎
例句：It looks as if most analysts agree.
多数分析师似乎都同意这一看法。

3. More than 40 MPs in Iraq have offered their resignations after the security forces broke up a long-running Sunni anti-government protest.

more than 不只是; 很; 超过; 在…次以上
例句：More than 1000 turned up.
最后共有1000多人出席。

4. The Federal Aviation Administration said sites from Alaska to Texas would be used to study the operation of unmanned aircraft in diverse climates and geography.

be used to 习惯于，适用于
例句：Even though you should be used to it by now, it's still stressful, but there's hope yet!
即便如此你也应该从现在开始习惯它，虽然会倍感压力，但希望仍在前方！