1. However, the collective smoke from thousands of factories, over the past two centuries, has caused enormous increases in air pollution levels worldwide.
    但是，在过去的两个世纪中，从千万家工厂排放出的烟尘已大大加剧了全球大气的污染度。

2. During the past 30 years, the triangle has claimed the lives of some 1,000 sailors and pilots.
    在过去的30年中，该三角已吞噬了近1,000名水手和飞机驾驶员的生命。

3. As a rule David clocks out at half past four on Saturdays.
    每逢星期六戴维总是在四点半时在自动记时钟上签退。

4. An individual human existence should be like a river----small at first, narrowly contained within its banks, and rushing passionately past boulders and over waterfalls.
    个人的存在应该像一条河流，开始很小，被紧紧地夹在两岸中间，接着热情奔放地冲过巨石，飞下瀑布。

5. As we were walking past a shop, he held a diamond firmly against the window and made a deep impression in the glass.
    我们路过一家商店时，他将一颗钻石使劲地往橱窗上一按，在玻璃上留下一道深痕。

6. At nineteen minutes past eight.
    8点19分。

7. And I shall read English books in science, history, geography, and in everything that will help me to know a lot more about man´s past and present.
    我还要读有关科技、历史、地理和其它方面的英文书籍，使自己更多地了解人类的过去和现在。

8. At half past two the clock was still going and he again fell asleep.
    两点半时钟还走着，他便又睡下了。

9. As I stand there, the smell hits my nose, and I close my eyes as I remember the smell of decay from past experience.
    我站在那里，一股怪味刺激着我的鼻子，我想起了过去闻到过的腐烂的气味，我闭上了眼睛。

10. You must be home at half past ten.
    你必须在10点半到家。