出毛病chūmáobìngMeanings1. a problem appears2. to break downCharacters used出to go out毛hair病illnessExamples1宿舍sùshè里lǐ的de暖气nuǎnqì系统xìtǒng出毛病chūmáobìng了le。Our dorm's heating system isn't working properly.