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单词 diazine
释义 di·a·zine
\ˈdīəˌzēn, dīˈaz-, -zə̇n\ noun
(-s)
Etymology: International Scientific Vocabulary di- + az- + -ine
1. : any of three parent compounds C4H4N2 containing a ring composed of four carbon atoms and two nitrogen atoms and distinguished by indication of the positions of the nitrogen atoms or by trivial names:
 a. : pyridazine
 b. : pyrimidine
 c. : pyrazine
2. : any of a large class of derivatives of the three parent diazines
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