MEANING/意义
      
  • dǒng háng
      
    sound for pinyin
      
      
    know one's job,know the business,familiar with one's job or business
    Type verb/动词  
        
    Topics 
EXAMPLES/列句
  •   
      
    tā hén dǒng háng
      
    sound for pinyin
    He's an expert.
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