off的解释
a. 远的,休假的,空闲的
ad. 走开,出发,隔断
prep. 离开,脱落,在...之外
off的例句
Please turn the light off before leaving the room.
离开房间前，请把灯关掉。

We went to the station to see her off.
我们去车站为她送行。