1. Enclosed in this outfit, I waited in line for an hour with other adventurers, mostly office workers in their 20's.
    我包裹在这一身装束里，与其他的历险者一起排了一小时队。他们大多是20多岁的办公室职员。

2. Would your twin live a shorter life because he or she started out with DNA that was already 10, 20, or 30 years old?
    你的孪生兄弟或姐妹出生时DNA就已经10、20或30岁了，难道就因为这样他或她的寿命会更短吗？

3. The motion to amend the club´s constitution was defeated by 20 votes to 15.
    修改俱乐部章程的动议以二十票对十五票被否决了。

4. The average output of the factory is 20 cars a day.
    该工厂的平均产量是每天20辆汽车.

5. The Hubble telescope was launched into space by NASA on April 20, 1990 at a cost of over a billion dollars.
    哈勃望远镜于1990年4月20日由国家航空航天局发射升空，耗资10多亿美元。

6. The government has succeeded in increasing use of birth control from 10 percent of the population 20 years ago to 49 percent today.
    印尼政府已成功地扩大了实行节制生育的范围，节育人口已从20年前的10%增加到今天的49%。

7. They believe schools will be things of the past in 20 years as media technology, like the Internet, teaches children.
    他们认为由于因特网这类传播技术能够让孩子们接受教育，20年之后学校将成为昨日黄花。

8. This is what the police say happened beginning at 3:20 AM in the proper, tree-lined neighborhood:
    以下是警方的描述：惨案始于凌晨3：20，案发地点是树木环绕的高级住宅区。

9. The parents agree in writing to meet monthly in one of 20 regional groups, go to a yearly three-day regional retreat, and spend at least three times a year in workshops, discussion groups and seminars at Bath.
    家长签约同意每月出席一次区小组会议（共20个区小组），每年去区休养所三天，每年至少参加三次巴思市的研修班、讨论组和研讨会。

10. The F-16 is a $20 million piece of hardware that has enough horsepower to fly at twice the speed of sound.
    F-16是个造价2,000万美元的硬家伙，马力大到能以两倍的音速飞行。