You can use ZIP compression and data encryption.
你可以使用ZIP压缩和数据加密。
You may also encounter KMZ files, which are just KML files compressed with ZIP compression.
您可能还会碰到KMZ文件，它们是用ZIP压缩了的KML文件。
The files are compressed into a ZIP file using one of many compression algorithms, but they all operate the same way: by removing redundant data or whitespace.
文件都是使用众多压缩算法中的一种算法压缩成一个ZIP文件的，但这些压缩算法都是以相同的方法操作：删除冗余数据或空白。
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