sulphurous acid
柯林斯词典
1. N an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3 亚硫酸 (Systematic name sulphuric(IV) acid)
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1. N an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3 亚硫酸 (Systematic name sulphuric(IV) acid)