许多 CD 使用的压缩文件系统映像通常是系统的闭环压缩回送驱动程序附带的。
Many CDs use a compressed filesystem image that often comes with the cloop compressed loopback driver.
压缩通常有很多好处，可以缩小文件大小，也可以把若干个文件绑定为一个归档文件。
Compression in general has many benefits, either related to the smaller file size or the ability to bundle several files into one archive file.
这种暂停通常比较短，除非需要进行压缩。
This pause is generally short, unless a compaction is required.
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