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

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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。