upgrading and updating

• 升级换代

upgrading and updating的用法和样例：

例句

1. Fourth, consumer goods have been updated and upgraded.
   四是消费品档次升级换代。
2. Rapid replacement and updating of various fire-control radars followed the breakthrough of airborne AESA technlogy.
   机载相控阵技术的突破，引发了多种型号战斗机的火控雷达升级换代。