verb🔗Share使坚韧, 强化。 To make tough."The difficult training regime is toughening the athletes for the upcoming competition. "这种艰苦的训练正在使运动员变得更坚韧，以便迎接即将到来的比赛。(Zhè zhǒng jiānkǔ de xùnliàn zhèngzài shǐ yùndòngyuán biàn dé gèng jiānrèn, yǐbiàn yíngjiē jíjiāng dàolái de bǐsài.)qualityconditionprocessabilityChat with AIVocabulary GamePractice Reading
verb🔗Share变硬，硬化。 To become tough."The young tree is toughening up against the strong winds. "这棵小树正在变得坚韧，以抵抗强风。conditionprocessqualitybodyChat with AIVocabulary GamePractice Reading
noun🔗Share增强，硬化。 The process of making something tougher."The winter boots underwent a special toughening to make them more resistant to ice and snow. "这些冬靴经过特殊的增强硬化处理，使其更耐冰雪。processmaterialtechnicalChat with AIVocabulary GamePractice Reading
