Before making changes to the registry, you should back up any valued data on the computer.

更改注册表前，应该对计算机上任何有价值的数据进行备份。

youdao

BACK UP your DATA Why: Because photos are not the only important things on your computer.

备份数据为什么：照片可不是电脑上唯一重要的东西。

youdao

The project was saved when the computer switched to an emergency 10-minute back-up power source.

项目在计算机切换到一个可维持十分钟的紧急电源后被挽救了。

youdao

The robot, which is analysing rock samples on the Red Planet, is now running from a back-up computer.

BBC: Mars rover

The fault means the rover's work has been put on temporary hold while the back-up computer is reconfigured so it can take full control.

BBC: Mars rover

The rover has been running on the back-up computer since Thursday.

BBC: Mars rover