keep down

动词 keep down:

1. place a limit on the number of
   同义词：number
2. put down by force or intimidation
   同义词：repress, quash, subdue, subjugate, reduce
3. manage not to throw up

1. Keep down! You mustn't let anybody see you.
   蹲下! 一定不要让人看见你。
2. Keep down of you'll be hit by shell fragments.
   别起来，否则你会被弹片击中的。
3. The people have been kept down for years by a brutal regime.
   人民多年遭受野蛮制度压迫。
4. Keep your head down!
   不要抬头！