1. Two friends were travelling together through a forest.
    两个朋友在一道旅行，穿过一座森林。

2. Then we shall make America a land of true liberty and justice for all!
    这样我们就会使美国成为大家都享有真正民主和公正待遇的国家！

3. To know what is going on outside our country, to tell our friends abroad what is going on in China, to carry out international trade — to do all this, a good command of foreign languages is necessary.
    无论了解国际动态，向国外的朋友通报国内新闻，还是要进行国际贸易，都需要熟练地掌握外语。

4. The movements of air make winds.
    空气流动便形成了风。

5. This would make them instantly identifiable to a computer.
    这样电脑就可立刻辨认出每一种食品。

6. To get to know the heart that beat within Marx the scholar, you had to see him when he had closed his books and was surrounded by his family, or on Sunday evenings in the society of his friends.
    要了解马克思这位学者的性情，你还得看看在合上书本之后他和家人在一起的时候，或者星期天晚上他和朋友在一起的情况。

7. They took his letters and saw that they were sent to his friends in Europe.
    他们负责把他的信寄给他在欧洲的朋友。

8. They take great pains to make their lessons easy and interesting, always repeating the same phrases and at the same time doing the thing they are talking about.
    他们尽力使他们的课程变得容易有趣，总是重复相同的短语，并与此同时做他们正在谈论着的事情。

9. They allowed the visits to continue if they thought the boy was someone who would make a good marriage partner.
    假如他们认为这个小伙子是他们女儿可以托付终身的人，就会让这种拜访持续下去。

10. Therefore, engineers have removed the water from some wet-lands in order to make useful land.
    为了利用湿地，工程师们把一些湿地里的水抽干。