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Toughen ˈtʌfn ˈtʌfən Vt.["使变坚韧","使变坚强","使变强硬","使变顽强 Vi.["变坚韧","变坚强","变强硬","变顽强

Toughen means to make something stronger or more resistant.

toughen 指使某物变坚韧、坚强或强硬。

单词 toughen
音标 [ˈtʌfn] [ˈtʌfən]
释义 vt.["使变坚韧","使变坚强","使变强硬","使变顽强"] vi.["变坚韧","变坚强","变强硬","变顽强"]

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