求翻译：文件头定义了swf文件的一些基本信息，比如文件标示、文件版本、文件大小、舞台大小、帧率和帧数等。文件标识用来标示该文件是不是swf文件盒是否经过压缩。如果文件标示的值为“FSW”，则说明该动画文件没有经过压缩。如果文件标示的值为“CSW”啧该文件从第9个字节开始采用Zlib无损压缩算法进行了压缩，必须解压缩后才能对swf文件进行正常分析。是什么意思？

The header defines the swf file with some basic information, such as a file marked, file version, file size, stage size, frame rate and frame rate. Identifies the file used to mark the file is not compressed swf file box. If the file marked value "fsw", the animation files are not compressed. If the

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File defines some basic information on a SWF file, such as the marked file, file version, and file size, stage size, frame rate, and number of frames. File identification used to mark whether or not the file is a SWF file after compression. If the file is marked as "FSW", then the animation file is