BBC在线收听下载:伦敦科学家发现让牙齿自行修复的方法

1. mount vt.登上; 骑上
例句：The ANC announced it was mounting a major campaign of mass political protests.
非洲人国民大会宣布他们正在开展一次大规模政治抗议活动。

2. obtain vt.获得，得到; 流行
例句：Evans was trying to obtain a false passport and other documents
埃文斯正试图取得一本假护照和其他证件。

3. increase vt.增加，增大，增多
例句：The population continues to increase
人口继续增长。

4. encourage vt.促进; 支持; 鼓励
例句：When things aren't going well, he encourages me, telling me not to give up.
事情进展不顺的时候，他鼓励我说不要放弃。

5. respect vt. 尊重; 尊敬; 关心; 遵守
例句：I want him to respect me as a career woman
我希望他把我当作一个职业女性来尊重。

6. prompte adj. 迅速的; 敏捷的; 立刻的
例句：Japan's recession has prompted consumers to cut back on buying cars
日本经济的不景气使得消费者在购买车辆上减少了开支。

7. challenge vt.质疑; 向…挑战
例句: We should learn from the Foolish Old Man his spirit to challenge nature.
要学习老愚公战天斗地的精神。

8. protective adj. 保护的，防护的; 保护贸易的
例句：Protective gloves reduce the absorption of chemicals through the skin
防护手套可以减少皮肤对化学物质的吸收。