你的问题的答案是Windows个人电脑有许多种备份装置，其中许多也可用于Mac电脑。
The answer is that there are many backup drives for Windows PCs, and that lots of them work with Macs as well.
问：使用Mac电脑的朋友告诉我，他们有一种可移动的备份装置，能够备份包括应用软件在内的整个硬盘。
Q: Friends who use Macs tell me they have a removable backup device that backs up their entire hard drive, including programs.
本发明还公开了一种影子内存的备份装置，包括冲突判定模块、合并模块、加载模块、事务执行模块，以及提交模块。
The invention also discloses a backup device for the shadow memory, comprising a conflict judging module, a merging module, a loading module, an affair implementing module and a submitting module.
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