mesitylene三: three甲基: methyl; methylium; carbinyl; ...5三甲基苯: mesitylene3,5-三甲基-2-環(huán)己烯-1-酮: isophorone1,3,5-三甲苯: sym-trimethylbenzene下載手機詞典可隨時隨地查詞查翻譯