sulfurous acid
sulfurous-acid的词性：
n.（名词）
1. A colorless solution of sulfur dioxide in water, H2SO 3, characterized by a suffocating sulfurous odor, used as a bleaching agent, preservative, and disinfectant.
亚硫酸：一种无色的、能溶于水的二氧化硫，H2SO 3，其特征是有令人窒息的气味，可用作漂白剂、防腐剂和消毒剂