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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Easy to read and straight-forward, Understanding Exposure offers the basics of aperture, lighting and shutter speed, photography’s basic triumvirate, to beginning and intermediate photographers.

面向初级和中级水平的摄影师，《理解曝光》用简单易懂的文字介绍了光圈、进光量和快门速度这“摄影三角”的基本知识。

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Thus, to speed up compilation, these files can be converted into an intermediate form that is easier for the compiler to understand so that subsequent compilations are faster.

因此，为了提高编译的速度，可以将这些文件转换为一种编译器更容易理解的中间形式，以便提高后续编译工作的速度。

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