n. 碰撞, 衰弱, 神经衰弱, 瓦解

字博缘文学网在线英汉词典
crack-up的短语、例句：
crack-up n (infml 口) loss of physical or mental health （身体的）衰退; （精神的）崩溃
a crack-up due to overwork 因操劳过度而招致的身体的衰退.

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