toughen

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

过去式：toughened过去分词：toughened现在分词：toughening第三人称单数：toughens

toughen up困难，使强壮

1. This experience will toughen her.
   这次经历会让他变坚韧。
2. The company leader said that army life would toughen the recruits up.
   连长说军队生活可以使新兵锻炼得更坚强。
3. All this mountain climbing will toughen the boys up.
   这些爬山运动会把孩子们锻炼得身强体壮。

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