慢速英语:US Investors Eye IPO for China's Alibaba

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1. estimate vt.估计，估算
例句：You estimate his intellect too highly. 
你把他的智力评估得太高。 

2. exchange vt.交换，互换
例句：What would you like to exchange?
请问你要兑换什么货币？

3. combine v.使结合; 使化合
例句：The idea was to combine strengths.
该计划的想法是强强联合。

4. expand vt.使…变大; 扩张
例句：My duties continue to expand.
我的职能继续扩张。

5. involve vt.包含; 使参与，牵涉
例句：The guidelines involve only microeconomic reforms.
指导方针仅仅包含微观经济改革。

6. raise vt.引起，抱起
例句：Don't raise your voice.
不要提高嗓门。

7. increase vt.增强，增进
例句：Experts believe self-driving cars will increase productivity.
专家认为，自驾汽车会提高生产力。