单词	sulfurous acid
释义	sulfurous acid noun : a weak unstable dibasic acid H2SO3 known in solution and through its salts and used as a reducing and bleaching agent Example Sentences Recent Examples on the Web Otherwise, the sulfur dioxide released from the bubbling lava would turn the watery fluid in your eyes’ mucus membranes into sulfurous acid. Sofie Bates, Popular Mechanics, 30 June 2020 Word History First Known Use 1790, in the meaning defined above Medical Definition sulfurous acid noun : a weak unstable dibasic acid H2SO3 known in solution and through its salts and used as a reducing and bleaching agent and in medicine as an antiseptic
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