upstreamwardsWiktionary 原文英美构词拆解upstreamupstream词干wards-wards后缀-wardsForming adjectives and adverbs denoting course or direction to, or motion or tendency toward, as in "backwards", "towards", etc.词源说明From upstream + -wards.释义形容词adjective1In an upstream direction.副词adverb1In an upstream direction.