慢速英语:Study: Humans Sleep Less, Better Than Other Animals

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1. efficient adj.有效率的; （直接） 生效的; 能干的
例句：I am sure he is an extremely efficient official.
我肯定他是一位极有效率的官员。

2. discover vt.发现; 碰见; 撞见
例句：The fact is that he did not discover it.
事实是他没有发现它。

3. conclude vt.推断; 结束，终止
例句：We may reasonably conclude that the meeting has been postponed.
我们可以推断会议推迟了。

4. prosper vi. 繁盛，成功
例句：Nothing will prosper in his hands.
在他手中，一事无成。

5. evolve vt.使发展; 使进化; 设计
例句：Buds evolve into flowers.
蓓蕾开放成花。