VOA慢速英语:After Brain Study, New Questions About Mobile Phones

例句：His name heads the list.
      他的名字居名单之首。

      Their cars headed the funeral procession.
      他们的车队在葬礼队伍的最前面。

2.exposure n.暴露, 显露

例句：After only a short exposure to sunlight he began to turn red.
      他在阳光下只晒了一会儿, 皮肤就开始变红了。

3.activate vt.使活动, 起动, 触发

例句：We must activate the youth to study.
      我们要激励青年去学习。

4.mute adj.缄默的; 无声的

例句：She gave me her hand with mute thanks.
      她向我伸手表示无言的谢意。

      The class remained mute when the teacher asked a difficult question.
      老师问到难题时, 全班都沉默无言。

5.antenna n.天线

例句：In our village, there is an antenna on every roof for receiving TV signals.
      在我们村里, 每家房顶上都有天线接收电视信号。

6.metabolism n.新陈代谢

例句：Their rate of metabolism may slow down.
      他们的新陈代谢率可能会降低。

7.emit vt.发出，射出，散发（光、热、声音、气等）

例句：She was heard to emit a cry of horror.
      人们听到她发出恐怖的叫声。

8.settle vt.解决; 决定; 调停

例句：She has decided how she should settle the matter.
      她已做出决定如何来了解这件事。

      And a word from him would settle everything.
      只要他说一句话, 一切问题就解决了。