更新换代 gēngxīnhuàndài to upgrade; to replace the old Origin Definitions Defs Strokes Stroke Words Sentences Sents 更新 gēngxīn verbnoun to update; to replace To replace the old with the new; to update, renew, or renovate换代 換代 huàndài to update to replace an older product with an upgraded or new-generation version; to update technology