Learning on 10/27/2025
読書 汉语 土木Oct 26, 2025, 8:50:40 PM
  Study time: 2 minute(s) 
  Today's learning: 17 
  New: 12 
  Consecutive study days: 1421
  Difficult review: 1 
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Oct 26, 2025, 8:50:40 PM
  Study time: 2 minute(s) 
  Today's learning: 17 
  New: 12 
  Consecutive study days: 1421
  Difficult review: 1