noun🔗Share坚韧，强硬。 The state of being tough"The athlete's toughness allowed her to finish the marathon despite a painful injury. "这位运动员的坚韧让她即使在受伤的情况下也完成了马拉松比赛。qualitycharactermaterialChat with AIVocabulary GamePractice Reading
noun🔗Share韧性，坚韧性 (of a metal) Resistance to fracture when stressed"The new metal alloy showed great toughness, resisting the stress of repeated bending without breaking. "这种新型金属合金表现出极佳的韧性，即使反复弯曲也不会断裂，能够承受很大的应力。materialphysicstechnicalChat with AIVocabulary GamePractice Reading
noun🔗Share困难，难题 A formidable difficulty"The toughness of the math exam surprised many students. "这次数学考试的难度让很多学生都感到意外。qualityconditionsituationcharacterChat with AIVocabulary GamePractice Reading
