VOA慢速英语:WHO: Millions Die Every Year from Air Pollution

1. estimate vt.估计，估算
例句：But companies should estimate costs comprehensively and conservatively.
但是公司应当综合谨慎地评估成本。

2. resolve vt.使消释; 使分解
例句：How to resolve this contradiction?
怎么解决这个矛盾呢？

3. extreme adj.极端的，过激的
例句：Go around such safeguards with extreme caution.
绕过这些安全措施要极为谨慎。

4. measure vi.测量; 测量
例句：They also measure gross national happiness.
他们还测量国民幸福指数。

5. observe vt. 观察; 研究
例句：Observe your kids performance in school.
观察孩子在学校的表现。

6. appear vi.出现，显现
例句：At least you appear classy.
这样至少你显得高贵。

7. provide vt. 提供，供给
例句：It is entirely appropriate to provide a separate room when one is needed. 
这时，为需要的人提供一个单独的房间是完全恰当的。

8. available adj.可用的; 有空的
例句：There are many validated assessments available.
有多种有效的评估手段。