单词	which river is it?
释义	which river is it? 这条是什么河?
随便看	universal uncertain model Universal Underwater Egress Trainer Universal Underwater Mobile universal underwater mobot universal unfolding universal unification universal unique identifier Universal Unitarian Universal Unitarians Universal United NZ Education Group universal unit of account universal unlisten universal upper bound universal upsetting and welding machine universal upsetting welder universal urethroscope universal use universal user Universal user management system universal validity universal value universal values universal valve universal valve lifter Universal van der Waals equation