我花了好几分钟才解开这条项链的扣子。

我花了好几分钟才解开这条项链的扣子。

It took me several minutes to undo the clasp of this necklace.

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It took me several minutes to undo the clasp of this necklace.

undo 由前缀 un-(表示“相反、取消”)和动词 do(做)组成,字面意思是“取消做过的动作”,引申为“解开、松开、撤销”等含义。在句中指解开项链扣的动作。

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