这个词是什么意思？
Nitrous acid (HNO2). A weak acid that exists only in solution. It can form water-soluble nitrites and stable esters. (From Merck Index, 11th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D009608 · MeSH 2026。
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