verb🔗Share使坚硬，使坚强。 To make tough."The chef had to toughen the meat by slow-cooking it for several hours. "厨师需要用慢炖几个小时的方法来使肉质变嫩并更易嚼，也可以理解为使肉变得酥烂。qualityconditionChat with AIVocabulary GamePractice Reading
verb🔗Share变硬，变得坚强。 To become tough."The cold weather toughened the young plants, making them stronger. "寒冷的天气使这些幼苗变得更加坚韧，让它们长得更壮实了。conditionabilityprocessChat with AIVocabulary GamePractice Reading
