ā qín

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释义

  1. 1. -azine
  2. 2. heterocyclic compound containing nitrogen in their ring such as pyridine 吡啶[bǐ dìng] C5H5N, pyrazine 噠嗪|哒嗪[dā qín] C4H4N2 or pyrimidine 嘧啶[mì dìng] C4H4N2