辗转难忘 (輾轉難忘) zhǎnzhuǎn nán wàng
          
              zhǎnzhuǎn nán wàng 
              
              phrase 
              to turn something over in one's mind and not be able to forget it 
              Domain: Literary Chinese 文言文
              
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                Notes: (Mathews 1931 '輾轉難忘', p. 15)