VOA慢速英语:Deadly Attack Shocks Canada's Capital

1. confirm vt.[法]确认，批准
例句：Unilever refused to confirm the news.
联合利华拒绝证实相关消息。
 
2. approval n.同意; 批准
例句：Why do you want their approval?
你为什么想要得到别人的认可呢？

3. infection n.<医>传染，感染
例句：Hand washing is an easy way to prevent infection.
洗手是预防传染病的一个简单方法。

4. observe vt. 观察; 研究
例句：Observe your kids performance in school.
观察孩子在学校的表现。

5. release vt.释放; 放开
例句：The whole release process is different.
整个发布的过程也不一样。

6. arrest vt.逮捕，拘捕
例句：Attempts are being made to arrest the spread of the disease. 
现正设法遏止这种疾病的蔓延.