BBC在线收听下载:联合国秘书长对达尔富地区形势表示担忧

词汇讲解：

1. collapse vi.折叠; 倒塌
例句：When people realize it's a worthless degree, the system is going to collapse.
当人们意识到这个学位毫无价值时，整个体系就会崩溃。

2. 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. 

3. interrogate vt.询问，审问
例句：The police took a long time to interrogate the offenders fully. 
警察花了很长时间对人犯进行了详细的审问。 

4. impose vt.强加; 征税
例句：I don't want to impose on you by staying too long. 
我不想打扰你,不多耽搁了。 

5. blame vt.指责，责怪
例句：Politics is partly to blame.
政治因素负有部分责任。

6. renegotiate vt.重新谈判
例句：It would have to renegotiate its position inside the european union.
它将不得不就它在欧盟（eu）内部的地位重新谈判。

7. expel vt.驱逐; 赶走
例句：The headmaster may expel the boy from the school. 
校长可能要把那个男孩从学校开除。 

8. prove vt.证明，证实
例句：Please prove your identity. 
请证明你的身份。