keep away 远离， 使离开，使站开 ，后跟宾语时要加介词from,即keep away from。
keep off 避开；不接近 。
1、Keep away from the doors while the train is moving
列车运行过程中要远离车门。
2、He is quite dangerous; you\'d better keep away from him.
他这个人很危险，你最好远着他一点儿。
3、I managed to stick to the diet and keep off sweet foods
我努力做到了只吃规定饮食，不沾甜食。
