罗姆尼向共和党内提名迈出重要一步

2. margin n. 差数;幅度
例句：He passed the exam by a narrow margin.
他勉强通过考试。

3. quest n. 探求, 寻找
例句：Man will suffer many disappointments in his quest for truth.
人类在探索真理过程中必然会遭受挫折。

4. boost n. 增加, 改进
例句：This has given share prices a big boost.
这已使股票价格大大提高。

5. contrast n. 对比, 对照
例句：The black paint on the door provides a contrast for the white walls.
门上的黑漆与白墙形成对比。

6. crush vt. 压服,压垮;摧毁
例句：Their plot to overthrow the government was crushed.
他们企图推翻政府的阴谋被粉碎了。

7. priority n. 优先考虑的事
例句：The development of the national economy is a top priority.
发展国民经济是应予以最优先考虑的事。

8. turnout n. 一项活动的到场人数
例句：There was a good turnout for the concert.
参加音乐会的人很多。

9. divisive adj. 引起分歧的;导致分裂的
例句：He believes that unemployment is socially divisive and is leading to the creation of an underclass.
他认为失业会造成社会分化，道致贫困阶层的产生。

10. overtake vt. 追上, 赶上, 超过
例句：Exports have already overtaken last year's figure.
出口量已超过了去年。