正文

VOA慢速英语:Mental Training Can Help Elderly Stay Sharp for Years

2014-02-13来源:VOA

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词汇讲解：

1. demonstrate vt.证明，证实
例句：Take action to demonstrate that you've heard.
采取行动去证明你所听到的。

2. perform vt. 执行; 履行
例句：Benfica didn't perform especially badly.
本菲卡的表现并不是很差。

3. volunteer n.志愿者，志愿兵
例句：Want to volunteer on vacation?
想要在假期做志愿者吗？

4. provide vt. 提供，供给
例句：Messrs litan and schramm provide detailed answers.
利坦和施拉姆先生给出了详细的答案。

5. effective adj.有效的; 起作用的
例句：The executive power needs a more effective check.
这种执行力需要更有效的控制。