慢速英语:New Treatment for AIDS Called a ‘Big Deal’

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词汇讲解：

1. expose vt.揭露，揭发
例句：I am going to expose all this humbug. 
我要揭露这一切骗人的鬼话。 

2. change vt.改变，变更
例句：This is not an answer that is likely to change after a person’s first use. 
一旦人们开始使用，这并不是一个需要更换的问题。 

3. recognize vt.认出; 识别
例句：Shape is the primary way we recognize what an object is. 
形状是我们辨识物体的最主要方式。 

4. infect vt.使受影响，感染
例句：Go away, I don't want to infect you with my cold. 
走开，我可不想把我的感冒传染给你。 

5. affect vt.影响; 假装
例句：The news did not affect her at all. 
这消息根本没引起她感情上的波动。