1. Economic development depends on political stability.
    经济发展依靠政治稳定。

2. English is widely used in international intercourse.
    英语在当今国际交往中用得很广。

3. Every four years, millions of people all over the world enjoy the international sports competition called the Olympics.
    每四年，世界上千百万人就会欣赏一次被称为奥林匹克的世界性大赛。

4. But this phase of our development is now finished.
    但这个发展阶段已经结束。

5. By 1989, almost every nation on earth had established a program educating its people about AIDS, according to Jonathan Mann, director of the World Health Organization's (WHO) International Program on AIDS.
    据世界卫生组织国际艾滋病项目主任乔纳森·曼说，到1989年几乎每个国家都制订了对公民进行艾滋病教育的计划。

6. Because females do not have this tendency (this brain division is known to be influenced by male sex chemicals), girls who perform well in mathematics are doing so because they are superior in their overall mental development.
    因为女性不具备这种趋势（人脑的这种分工已知是男性激素影响的结果），数学好的女孩是因为她们的整体智力发育很好。

7. With the development of modern agriculture and industry, more and more waste is produced.
    随着现代工农业的发展, 产生出越来越多的废物.

8. Why don´t you entrust that to a travel agency?
    为什么你不交托给旅行社呢?

9. What is called ´modern civilization´ is not the result of a balanced development of all man´s nature,
    所谓"现代文明"并不是人的天性平衡发展的结果，

10. Where the cost of government is high, resources for development are correspondingly low.
    凡是政府管理费用高的地方，用于发展国家经济的资金就会相应地减少。