事先;预先;
Make a check on your answers before hand in.
交上来之前再核对一下答案.
Inspection and acceptance before hand over to the clients.
风力发电机组移交用户前的验收检验.
Note: If you want to travel separately, please notice the work staff before hand.
注: 若有单独行动, 请提前通知工作人员并说明原因.
Why don't you prepare it before hand?
怎不早做准备?
How clever of you to book the ticket before hand!
你真聪明,预先把票子买好了.
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