他刚到家就开始拆行李箱。

他刚到家就开始拆行李箱。

He started unpacking his suitcase as soon as he got home.

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He started unpacking his suitcase as soon as he got home.

unpacking 是动词 unpack 的现在分词形式。unpack 由前缀 un-(表示"相反动作")和动词 pack(打包)组成,字面意思是"拆开打包的东西",即"拆包、打开行李"。

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