孜孜矻矻 zīzī kūkū
          
              zīzī kūkū 
              
              phrase 
              diligently 
              Domain: Modern Chinese 现代汉语
              
              
              
              
                Notes: (CC-CEDICT '孜孜矻矻')
              
               
          
          
Word is mentioned most frequently in
Truncated for common words