这些空间乘上总的线程数目可以占用RAM的很大的空间。

This space, multiplied by the total threads number, can amount to a significant RAM overhead.

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例如，在有多个文件的文件系统中，文件占用的空间与系统中未用的空间之和应该等于总的可用空间。

For example, in a file system with multiple files, the sum of the space taken by the files plus the free space in the system must be equal to the total available space.

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