文件读写，相当于复制一个文件，但有少量内容更改。

File Read And Write, but with less change, rather than copy a file.

youdao

这是一个复杂的系统，数据被复制到多个中间设备，通常是为了在数百万人同时试图访问服务时加快文件访问速度。

It's a complex system wherein data is copied to multiple intermediate devices, usually to speed up access to files when millions of people are trying to access the service at the same time.

youdao

这种方法类似于从一个目录复制文件到另一个目录。

This method is very similar to copying a file from one directory to another directory.

youdao