BBC在线收听下载:俄罗斯南部遭遇暴雨袭击

词汇讲解：

1. overthrow vt. 打倒;推翻;废除
例句：Fascism had lawlessly overthrown the democratic government.
法西斯非法推翻了民主政府。

2. elect vt. 选举;推选
例句：They elected Tom as their representative.
他们选举汤姆作为他们的代表。

3. encourage vt. 鼓励;怂恿
例句：She encouraged him to talk to her.
她鼓励他与她交谈。

4. delay vt. 延缓;使延期
例句：The accident delayed the train for two hours.
事故使火车耽搁了两小时。

5. identify vt. 确认;识别;鉴定,验明
例句：She identified him as her attacker.
她认出他就是袭击她的人。

6. boost vt. 推动;促进
例句：The company boosted its sales this year.
这家公司使今年的销售量增加了。

7. opponent n. 对手;敌手,反对者
例句：He easily defeated his opponent in the election.
选举中他轻易地击败了对手。

8. increase vt. 增大;增加;增强
例句：Travel increases one's knowledge of the world.
旅游增进人对世界的了解。