tougher
definitions
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adjective
more difficult to break, damage, or defeat; stronger or more resilientzh: 更坚固的;更坚韧的
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adjective
more severe or harsh in naturezh: 更严厉的
examples
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steel is tougher than aluminum
钢比铝更坚固
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the rules are tougher this year
今年的规则更严厉