sharpen
核心词议：

速记方法
速记技巧 联想记忆法 shar，削；pen，笔；
记忆法：“削尖”笔就是使笔“变锐利”。 谐音记忆法 sharp锐利的+-ensharp，锋利的，-en，使。

知识扩展
单词用法 注意很多形容词加en后缀可变为动词；如short/wide/weak
重要短语
sharpen up使……更敏锐；认真思考

中文词源： sharpen 使锋利 sharp,锋利的，-en,使。 sharpen
精选例句

常见考点例句：

That is unsurprising , but will sharpen the debate about the future of america 's nuclear presence in europe .

这虽不出人意料，但也还是会使关于未来美国在欧洲存放核武器的争议尖锐化。

The move is likely to sharpen the already intense competition between google and microsoft , whose windows operating system controls the basic functions of the vast majority of personal computers .

这次的举动将会使谷歌和windows系统控制绝大多数个人电脑基本功能的微软之间本来激烈的竞争变得更加尖锐。

Facebook 's moves sharpen the battle lines between the social networking giant and google , the search giant , because facebook is trying to change the way people find what they want online .

脸谱的行动使社交网站巨人和搜索网站巨人谷歌之间的战线更加尖锐，因为脸谱正在试图改变人们找到他们想去在线的方式。

But as the chill winds of austerity blow away the affluence and optimism of the boom years before the credit crunch , relations between rich and poor look set to sharpen as sky-high property prices and the inflated cost of goods in shops make life increasingly difficult and inaccessible for poor people in the capital .

但是随着勒紧腰带生活的寒风吹走信用紧缩之前繁荣年代的富足和乐观，贫富关系很快走向尖锐，因为天价房屋价格和商店货物开销飞涨造成生活困难不断增加，而且这种情况对首都的穷人来说是无法接受的。

On the contrary , any signs that washington wants to intimidate the middle kingdom will only sharpen nationalist and xenophobic tendencies .

相反，美国企图恐吓中国的任何举动，只会加剧中国国内的民族主义和排外倾向。