1. 正如科学家所预言的那样，全球污染成了人类面临的最严重的问题之一。

As it is predicted by scientists,global pollution has become one of the most serious problem which humans are faced with.

2. 谋求这些职位的竞争很激烈——今年的求职者是去年的五倍。

Competition for this job is very tough that we have five times as many applicants this year as we did last year.

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。

As the fact show, educational programs need to fit into the national plan for economic development.

4. 这辆汽车太费油，而且价钱几乎是我想付的两倍。

The car burns too much gas, and the price is almost twice as much as I intend 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 understand a great international event, first of all, we need to consider its historical and political background.