The results indicated so2 could transform into sulfite in vivo after so : inhalation and distribution into lung and other organs such as brain and heart , these results offer a support for the viewpoint that so2 is a systemic toxic agent 这说明so _ 2被小鼠吸入后可转化为亚硫酸盐并可分布到肺和其他器官如脑和心等,从而为so _ 2是一种全身性毒物的观点提供支持。