- (使)蹲下，卧倒；(使)不抬起：
If the enemy opened fire, keep down.
如果敌人开火，就卧倒。
He keeps his head down as his mother blames him.
他母亲谴责他时，他始终低着头。
- (使)…降低(或缓和)；(风力等)减弱:
The local government tries to keep the prices down.
当地政府努力使物价下降。
If the wind keeps down, we shall go out.
如果风力减弱，我们就出去。
I really wish she can keep her voices down.
我真希望她能把嗓门放低些。
- 控制，抑制，限制；缩减；除去(杂草)：
He couldn't keep down his anger.
他无法控制怒气。
to keep down expenditure
缩减开支
The gardener takes a lot of trouble to keep down the weeds.
那位园丁费了好大劲才把杂草除去。
- 压迫，压制，压服，镇压：
The government tried to keep down the rebels.
政府试图镇压反叛者。
The king tried to keep the conquered people down.
国王试图压服被占领区的人民。
- 使(食物)不吐出来；咽下，吞下：
She feels sick and hasn't been able to keep her food down.
她觉得恶心，把吃的东西全吐出来了。
I found it very difficult to keep my breakfast down.
我发现很难咽下早饭。
- 【印刷】用小活字排印
- 一直睡着(或坐着)：
The child kept down in bed the whole day.
那个孩子一整天都在床上睡着。
- [英国英语](使)留级：
If he failed in the exam again, he would be kept down next term.
如果他考试再不及格，下学期他就得留级。