methylsulfonylmethaneWiktionary 原文构词拆分methyl词根/词干+sulfonyl词根/词干+methane词根/词干词源说明From methyl + sulfonyl + methane.释义（英文）名词 Noun(organic chemistry) An organosulfur compound with the chemical formula (CH3)2SO2.词族派生词（1）MSM