hand in
参考词典中hand in的常规释义：
基本释义
- 交出,提出
参考例句
- He is a well-known master-hand in surgery.
他在外科手术上是有名的高手。 - He took a hand in helping to stabilize the situation.
他为稳定局势出了一臂之力。 - The right hand is dominant in most people.
大多数人的右手是优势手。 - I want you both to hand in your exercise - book today.
我要你们俩今天把练习本交上来。 - The boy is dabbling his hand in the water.
这孩子正用手玩水。
- He is a well-known master-hand in surgery.
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