file compression

• 文件压缩

file compression的用法和样例：

例句

1. Simple light-weight file compression and decompression utilities.
   简单的轻量级文件压缩和解压工具。
2. The Video Format line should contain information about the type of compression used to compress the file.
   视频格式行应包含的用来压缩文件压缩类型信息。