leave离开;走开;
When will you leave?你什么时候离开?
get away离开(更倾向于逃离的意思);
He got away when the police came.警察一来他就离开了。
run away 跑开(更倾向于逃亡的意思);
The thief ran away without caring for anything.
小偷不顾一切地往前跑走。
苍蝇被食蝇草抓住了,不能离开:
The fly was caught by the grass ,and it can not get away.
参考资料:百度知道