慢速英语:Deadly Attack on Afghan Government Officials

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短语讲解：

1. At least four civilians were killed.

at least 至少
例句：In fact it requires at least n generators.
事实上，它至少要有n个元素。

2. More than 50 people were killed last Friday in an attack on an American base near the airport and on an Afghan police training center.
 
more than 多于
例句：Margaret needed support more than ever.
玛格丽特比以往更需要关心。

3. The shooting took place on what had been a day of peaceful demonstrations in Ferguson.

take place 发生，举行
例句：His graduation will never take place if he doesn't get to work.
如果他不下功夫，就永远不会毕业。

4. The message said the group had carried out the attack.

carry out 履行
例句：No matter what we do, we must carry out our duties.
无论干什么工作,我们都应履行自己的职责。