Hydrogen sulfide and methyl mercaptan are toxic as well as malodorous;they can damage cells and thus may be a factor in gum disease.是什么意思_Hydrogen sulfide and methyl mercaptan are toxic as well as malodorous;they can damage cells and thus may be a factor in gum disease.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句