Definition: to improve something so that it is of a higher quality or is a newer model Level: B2
我们决定升级我们的计算机系统以提高其速度。
We decided to ___upgrade our computer system to enhance its speed.
系统已经升级以支持新功能。
The system has been ___upgraded to support new features.
计算机升级了大多数现有发明，使它们更用户友好。
The computer [has] ___upgraded most existing inventions, making them more user-friendly.
