trimonthlyWiktionary 原文英美构词拆解tritri-前缀monthlymonthly词干tri-Three. · (chemistry) Used for the digit three to form systematic element names of elements whose existence has been predicted, and which have not yet been given a trivial name.释义形容词adjective1Occurring at intervals three months apart.名词noun1A periodical publication that appears four times per year (every three months).