1.正如科学家所预言的那样（非限制性定语从句），全球污染成了人类面临的最严重的问题之一。
预言predict 全球global 人类man/mankind 面临be faced with 严重serious/severe
As scientists predicted,global pollution becomes one of the most serious problems humans are faced with.
2.谋求这些职业的竞争很激烈——今年的求职者（applicant)是去年的五倍。
竞争competition 激烈tough/fierce 五倍five times as...as...
Competition for these positions is fierce——this year's applicants are five times as many as last year`s.
3.正如事实表明的那样，教育大纲应当符合国家的经济发展计划。
表明indicate
教育大纲education/educational program
符合fit into 国家national
经济发展计划plan for economy progress
As the facts indicate,education program should fit on national plan for economy progress.
4.这辆汽车太费油了（burn/eat too much gas）,而且价钱几乎是我想付的两倍。
而且morever
几乎almost/about/approximately
想plan/intand to do
两倍twice as...as...
The car burns to much gas,morever the price is approximately twice as much as I plan to pay.
5.要了解一起重大的国际事件，我们首先需要考虑其历史与政治背景。
To do.../in order to...
重大的emergency/important
国际事件international event
首先at first/firstly 考虑consider
背景background
To know an important international event,we need to consider its historical and political background.
