VOA慢速英语:Two Suspects in California Shooting Dead

短语讲解：

1. He said he is not sure if the man helped the attackers or was trying to find a safe place away from the shooting.

be sure  确信; 诚然; 有谱儿
例句：Can we be sure that she's honest?
我们能相信她是诚实的吗?

2. He said he did not know why the attack took place.

take place 发生，举行
例句：Earthquakes take place far underground.
地震则发生在地球的极深处。

3. An FBI official at the shooting scene said he was not immediately willing to describe the shooting as linked to international terrorism.

be willing to 乐于; 肯; 甘于
例句：That man will be willing to talk to you.
那人乐意跟你聊聊。

4. Farhan Kahn said he did not know why Farook had carried out the attack.
 
carry out 进行; 执行; 完成
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。