1.off duty 下班
例句：
Only one doctor is on duty today the other doctor is off duty.
今天只有一个医生值班，另一位下班了。
2.on earth 究竟，到底
例句：
Who on earth beat him?
究竟是谁击败了他？
3.at all events 无论如何
例句：
At all events you had better try.
你无论如何最好试一试。
4.in any event 无论如何
例句：
In any event, the economy has developed rapidly in the last few years.
不管怎么说，这几年经济发展是快的。
5.in effect 有效;实际上
例句：
The two systems are, in effect, identical.
这两种制度实际上一模一样。