慢速英语:Facebook Stock Goes on Sale

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词汇讲解：

1. exchange vt. 交换;调换
例句：I'd like to exchange some pounds for dollars.
我想把一些英镑兑换成美金。

2. avoid vt. 避开,躲开
例句：I avoided him as much as possible.
我尽量避开他。

3. increase vt. 增大;增加;增强
例句：Travel increases one's knowledge of the world.
旅游增进人对世界的了解。

4. earn vt. 赚得,挣得
例句：How much do you earn a week?
你一周赚多少钱?

5. virtual adj. 事实上的,实际上的,实质上的
例句：He is in a state of virtual slavery.
他实际上处于一种被奴役的状态。

6. criticize vt. 批评;批判;苛求
例句：He criticized her in a very unfair way.
他极不公平地指谪她。

7. application n. 应用,适用;运用
例句：Biology has practical applications.
生物学有实用性。

8. approval n. 批准;认可
例句：The plan had the approval of the school authorities.
计划得到学校当局的认可。