鉴往知来 (鑒往知來) jiàn wǎng zhī lái
          
              jiàn wǎng zhī lái 
              
              set phrase 
              to observe the past to foresee the future (idiom, taken loosely from Book of Songs) 
              Domain: Idiom 成语
              
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                Notes: (CC-CEDICT '鑒往知來')