upgrade意思介绍 upgrade是什么意思

1、upgrade的意思是：使（机器、计算机系统等）升级；提高；改进 。

2、例句：

to upgrade the towns leisure facilities.改善镇里的休闲设施。

Helicopters have been upgraded and modernized.直升机已经更新换代，装配了现代化设备。