2) 面对巨大的灾难，整个社会致力于解救废墟中的人们。

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Key: 1)You'll solve the problem if you concentrate upon it. 2) Facing the great disaster, the whole society concentrated its attention on rescuing the people in ruin.

1. course n.过程；进程；课程；一道菜

[典例]

a course of medical treatments. 医学治疗的一个疗程

a short -term course短期班

a dinner of five courses有五菜的正餐

[练习] 汉译英

---在上课期间必须关闭手机吗？

---当然。

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Keys:---shall we shut the mobile phone in the course of lecture?

---of course.

2. trade 1) vi.交易, 买卖, 经商, 对换, 购物vt.用...进行交换 2) n.行业；贸易；商业

[典例]

1）He is engaged in trade.他经商。

2）This is the trick of the trade. 这是经商的诀窍。

3）England trades with nearly all the countries in the world.英国几乎与世界上所有的国家进行贸易往来。

[重要用法]

trade in...做...生意, 经营

trade sth. for sth.以...换取...;

trade sth. with sb. 同某人交换某物

[练习]汉译英

1）如果你不喜欢你的书, 我和你对换。

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2）你愿意将这本杂志换你的袜子吗？

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Keys1）If you don't like your book, I'll trade with you. 2）Would you like to trade the magazine for your socks?

3. defend vt.防护,护卫; 以行动, 语言或文字替...辩护或答辩

[典例]

1. defend the motherland保卫祖国

2. The accused man had a lawyer to defend him. 被告有一律师为他辩护。

[重要用法]