Because this system is limited to application layer discussion, so do go into the specificcompression algorithm.
由于本系统只限于应用层程序的探讨，所以对具体的压缩算法不做深究。
2
The product should allow compression of files delivered from specific directories and URLs.
该产品应该允许压缩来自特定目录和URL的文件。
3
You can obtain considerably better compression rates when you use the specific structure of XML documents to produce more compressible representations.