keep off是什么意思

　　Keep off at your peril!

　　走开，否则发生危险自己负责！

　　Keep off the grass.

　　请勿践踏草地。

　　We'd better keep off the sensitive topic.

　　我们最好避开这个敏感的话题。

　　Some bread will keep off hunger for a while.

　　吃些面包会抵挡一会儿饥饿感。