styrofoamedWiktionary 原文英美构词拆解styrofoamstyrofoam词干ed-ed后缀-edUsed to form past tenses of (regular) verbs. In linguistics, it is used for the base form of any past form. See -t for a variant.词源说明From styrofoam + -ed.释义形容词adjective1Covered or packaged in styrofoam.