下工夫 xiàgōngfu
          
              xiàgōngfu 
              
              verb 
              to put in time and energy; to concentrate one's efforts 
              Domain: Modern Chinese 现代汉语
              
              
              
              
                Notes: (CC-CEDICT '下工夫')
              
               
          
          
Word is mentioned most frequently in
Truncated for common words