| 释义 |
升级换代 shēng jí huàn dài
基本例句
〔动〕upgrade and update；renovate and change the dynasty；update and upgrade产品的升级换代updating and upgrading of products升级升級换代近几年来数码产品的升级换代越来越快。The upgrading and updating of digital products have accelerated for the past several years. |