To protect the previous data resources, file online backup system came into being.

为了保护这些珍贵的数据资源，各种文件备份系统应运而生。

youdao

To protect the previous data resources, file online backup system came into being.

为了保护这些珍贵的数据资源，各种文件备份系统应运而生。

youdao