sulfurous acid
(inorganic chemistry) The weak acid, H₂SO₃, present in a solution of sulfur dioxide in water; it is a reducing agent and mild bleach.
(rare) Alternative spelling of tsar
An atmospheric brightness seen from sea over distant snow-covered land in arctic regions.
Third-person singular simple present indicative form of hello
二酸化硫黄が雨水に溶けると、亜硫酸（H₂SO₃）という弱酸が生成され、酸性雨の原因となる。
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