基本词汇
v.变坚韧；变健壮；变顽固
名词: toughener 过去式: toughened 过去分词: toughened 现在分词: toughening 第三人称单数: toughens
英英释义
"This experience will toughen her"
经典引文
I hate my school..but Daddy was adamant. He said it would toughen me up.
出自：C. HarknessOld sandals, the leather stained and toughened by sea water.
出自：P. D. James别人正在查
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