231.emerge from 出现,暴露
232.place an emphasis on 强调,把重点放在上
233.encourage sb. in 鼓励;encourage sb. in his/her work 鼓励某人工作;encourage sb. in his/her idleness 怂恿某人游手好闲
234.encourage sb. in with sth. 用鼓励某人做某事
235.on end 连续地
236. at an end 结束了
237.no end of 很多,大量
238.in the end 最终
239.at ones wits end 无法可想,智穷计尽
240.end up with 以而结束
241.come to and end 结束
242.end in 以为结束
243.engage in 或be engaged in 忙于,从事
244.enter for 报名参加
245.enter into 开始
246.enter on / upon 开始
247.be entitled to 有权,有资格
248.be equal to 等于
249.be/ feel equal to 能胜任,能应付
on equal terms 平等地
250.be equipped with 装备有,装有
Tensions rising again over Iran's nuclear program(视频)
Scientists seek HIV vaccine using monkey model
Touring colleges, without ever leaving home
Worries about rising food prices may ease
Fewer children under the age of five are dying
American's first exchange students from China
US drought renews debate on biofuel
US automakers bet billions on Russian car boom
'War of 1812' flag still inspires after 200 years
American history: Columbus discovers the New World
The legal battle between Apple and SamsungDownloa
Nokia, Microsoft promote new phones
Designing an alternative to antibiotics
IB program aims to form 'students of the world'(视频)
Refugee camps spread life-threatening diseases
Tons of methane gas could be trapped under Antarctica
Marylanders recall bloodiest day in US history
Tree deaths linked to climate change
Somalis in US optimistic about changes back home(视频)
Reality of mormon life more complex than Romney image(视频)
The Occupy Movement turns one
Do sex strikes work?
US firms prospering in Asia, Russia(视频)
Teens help revive California nature
Sea life color codes food to evade danger
Driving with GPS can be difficult to navigate
Despite recession, blow-dry bars heat up
Men face higher death risk, but why?
To avoid humans, tigers take night shift
Cancer drug finds HIV hidden in the body