| 单词 | toughen |
| 释义 | toughentoughenstoughenedtougheningtoughentoughen /ˈtʌfən/ (also toughen uptoughen upstoughen uppedtoughen uppingtoughen up) verb [intransitive and transitive] to become stronger, or to make someone or something stronger: The army toughened him up.toughen 军旅生涯使他变得坚强起来。 |
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