verb · to update or improve computer hardware, software, or systems

你最好把手机操作系统升级到最新版本。

verb · to increase in intensity, scale, or severity

为了防止局势进一步升级，双方决定进行对话。

verb · to go up by one grade or be promoted to a higher rank

由于表现优异，他在工作半年后就升级了。