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.

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。

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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 simultaneously. Yahoo!

这是一个复杂的系统，上面的数据被拷贝到多台中间设备，通常这是为了在有数以百万的人们试图同时要获得服务的情况下提高文件读取速度。

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