He thinks boxing is good for kids, that it toughens them up.
他认为拳击对小孩子有好处，可使他们变得坚强。
柯林斯例句
They believe that participating in fights toughens boys and shows them how to be men.
他们认为参与打架会使男孩子变得坚强，教会他们怎样成为男人。
柯林斯例句
Adversity toughens him as well as wounding him.
逆境给他造成创伤,可也使他变得坚强起来.
辞典例句
Toughens the Barbarian's skin, increasing armor by X %.
使野蛮人的皮肤变硬, 增加X%护甲.
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