tetrahydroWiktionary 原文英美构词拆解tetratetra-前缀hydrohydro词干tetra-Four.词源说明From tetra- + hydro.释义名词noun1(chemistry, in combination) Four hydrogen atom substituents in a molecule同族词派生词 8tacrine·tetrabenazine·tetrahydrogestrinone·tetrazepam·tetracannabinol