疲劳 píláo HSK7 fatigue Definitions Defs Origin Strokes Stroke Words Sentences Sents 慢性疲劳症候群 mànxìngpíláozhènghòuqún chronic fatigue syndrome chronic fatigue syndrome (CFS)疲劳症 píláozhèng fatigue 金属疲劳 jīnshǔpíláo metal fatigue