BBC在线收听下载:美国第一夫人米歇尔．奥巴马最后一次演讲

1. election n. 选举，当选; 选举权
例句：During his election campaign he promised to put the economy back on its feet
他在竞选时许诺将重振经济。

2. undermine  vt.逐渐削弱; 使逐步减少效力
例句：Incidents like these began to undermine Angleton's credibility.
这一类事情开始损毁安格尔顿的声誉。

3. denigrate vt.玷污; 毁誉; 诋毁
例句：The amendment prohibits obscene or indecent materials which denigrate the objects or beliefs of a particular religion
该修正案对贬损某一宗教教物或信仰的淫秽或不雅内容予以禁止。

4. influence n.影响; 势力; 有影响的人（或事物）
例句：As Hugh grew older, she had less influence and couldn't control him
休慢慢长大，她的影响力变小了，无法再控制他了。

5. appeale vi.（迫切） 要求; 有吸引力; 求助（于）; 提请注意
例句：This is not another appeal for famine relief.
这不是为赈济饥荒的又一次募捐。

6. empower vt. 授权; 准许; 使能够
例句：The army is now empowered to operate on a shoot-to-kill basis
军队得到授权，在行动中可以开枪射杀。