The stylesheet attempts to guess the file separator for your system by querying. 和其他属性试图猜测系统所用的文件分隔符。
This prevents any missing file errors you might get as a result of using the wrong delimiter, and it makes your code more portable. 这样可以防止由于使用分隔符而导致文件丢失错误,同时这样还可以让你的代码更轻便。