CRI听力:New Light System Helps Patients Heal

2. investigate vt. 调查; 审查
例句：He has carefully investigated the allegations.
他对这些指控作了详细调查。

3. recovery n. 恢复健康, 复原
例句：He made a quick recovery from his illness and was soon back at work.
他生病后康复得很快, 不久就去上班了。

4. stimulate vt. 促进...的功能
例句：Exercise stimulates the flow of blood.
锻炼促进血液循环。

5. demonstrate vt.说明, 演示；论证, 证明；显示, 表露
例句：The fireman demonstrated great courage in saving the child.
那位消防队员在抢救孩子的过程中, 表现了极大的勇气。

6. reduce vt.缩减, 减少; 降低
例句：He won't reduce the rent of our house.
他不肯减少我们住房的租金。

7. survey n. 调查
例句：The reporter is doing a survey of public attitudes.
那位记者正在进行民意调查。

8. standard adj. 标准的
例句：He wrote in standard English.
他用标准英文写作。

9. beneficial adj. 有益的, 有利的
例句：I hope your holiday will be beneficial to you.
我希望你的假期会对你有益。

10. prolong vt.延长; 拉长; 拖延
例句：Two countries prolonged signing an agreement until details could be agreed on.
两国推迟签约直到就细节达成协议。