劳损 láosǔn strain Origin Definitions Defs Strokes Stroke Words Sentences Sents 腰肌劳损 yāojīláosǔn lumbar muscle strain Strain of the muscles in the lower back, usually caused by overexertion or sudden movement.重复性劳损 chóngfùxìngláosǔn repetitive strain injury repetitive strain injury; RSI