他将所有积蓄投资于那个风险项目是一个不明智的决定。

It was an unwise decision to invest all his savings in that risky venture.

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It was an unwise decision to invest all his savings in that risky venture.

unwise 是由形容词 wise(明智的)加上否定前缀 un- 构成的形容词,un- 表示"不、非",所以 unwise 的意思是"不明智的"。

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