慢速英语:Russia Says Flyover of US Ship Was Safe

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1. simulate vt. 模拟; 模仿; 假装
例句：Many believe artificial soils do not simulate natural soils.
许多人相信人造土并不像天然土。

2. observe vt.观察; 研究
例句：As a child, he liked to observe the behaviour of insects.
他小时候喜欢观察昆虫的习性。

3. response n.反应; 回答，答复
例句：Millions of people gave freely in response to the famine appeal.
千百万人响应救灾呼吁而慷慨解囊。

4. describe vt. 叙述; 描写，形容
例句：It is very difficult to describe my joy in words.
我的快乐难以用语言来形容。

5. investigation n.侦查; （正式的） 调查，研究
例句：The investigation revealed no impropriety.
调查表明没有不正当的做法。