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

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

Reconfirm. If you rely on slides or computer-generated images, have a back-up plan.

如果你依靠幻灯片或者要用电脑展示图片的话，一定要有一个备选方案。

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"Benefits to firms will include faster file storage, computer back-up and processing for example, " he said.

BBC: England

She produced fake medical certificates on her home computer in a bid to back up her story.

BBC: Kelly Baker

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

BBC: Mars rover