VOA慢速英语:Scientists Announce the Discovery of More Than 1,200 Possible Planets

例句：We were eager to hear the announcement of the winner of the race.
      我们急于想听到宣布赛跑优胜者名单。

2.exoplanet n.外星球

3.moderate adj.中等的, 适度的, 不很大的

例句：He has a room of moderate size.
      他有一个适中的房间。

4.decrease vt.vi.(使)缩短; 减小, 减少

例句：The traffic accidents in the city decreased last year.
      该城市去年交通事故减少了。

      The population began to decrease.
      人口开始减少。

5.approach vt.vi.接近, 走近, 靠近

例句：Christmas was approaching.
      圣诞节快到了。

6.principal adj.最重要的; 主要的

例句：Drinking is a principal cause of highway deaths.
      酗酒是公路死亡事故的最主要的原因。

7.relatively adv.相对地,比较而言;相当

例句：a piece that is relatively easy to play
      比较容易演奏的乐曲

8.nearly ad.将近,几乎,差不多

例句：The small brook nearly dried up.
      这条小河沟几乎干涸了。