file opening的用法和樣例：
例句
- If it is successful at reducing the fragmentation it will tell you the number of clusters the file started with and the number it consists of after the defragmentation.
如果在減少粉碎時成功了，它會告訴你文件開啟時的叢數量和整理后組成它的叢的數量。 - Function to return the file mode of an open file.
函數返回打開文件的文件模式。 - A requested opened file is not a directory.
要求的已打開文件不是目錄。
