VOA慢速英语:Study Links Bedtime Rules to Better Skills in Preschool Children

例句：The police enforce the law.
      警察执法。

2.independently adv.独立地,自立地;无关地

例句：The enquiry must be independently conducted.
      这次调查必须独立进行。

      He argued that ideas do not exist independently of the language that expresses them.
      他论证说，思想不会独立存在于用以表达的语言之外。

3.routine n.例行公事, 惯例, 惯常的程序

例句：The security men changed their usual routine and collected the money at a different time.
      保安人员改变了他们通常的做法, 在不同的时间取款。

4.predictor n.预言者,预告者

例句：A woman predictor;a woman soothsayer.
      女预言家;女断言家

5.sleepy adj.欲睡的;困乏的

例句：Her yawn suggests that she is sleepy.
      她打哈欠表示她很困了。

6.extend vt.延长; 扩展; 达到(某一点)

例句：France has greatly extended its influence in world affairs.
      在世界事务中, 法国的影响已大大地扩大了。

7.nap n.小睡, 打盹

例句：Mr. Green usually has a nap after lunch.
      格林先生习惯于午饭后睡一会。