The result is True if the file tested is a file that exists and that has the specified characteristic.
如果被测试的文件存在，而且有指定的特征，则结果为 True。
2
The characteristic of the documentary had it become a "stereoscopic file "of history and realistic "document notes".
纪录片的这种特性，使它成为了历史的“立体档案”和现实的“文献笔记”。
3
In the Syntax testing module, the testing method of file identifier, key word, etc, which adopts computer compile technology, combining the structure characteristic of examined file, is researched.