单词 trimethyl 释义 trimethyl Chem.|traml, -al|[f. tri- 5 + methyl.]a. A formative denoting the presence of three methyl groups, CH3, in a compound, as trimethyl-arsine, As(CH3)3, trimethyl-phosphine, P(CH3)3: see also trimethylamine below. b. spec. deno...