1·The second was that, when unlinking a directory, pseudo helpfully unlinks the contents of that directory.
第二个选择是，在断开目录链接时，pseudo 可以帮助断开该目录的内容的链接。
2·Unlinking the file has a lot of advantages for code maintenance. The file is automatically deleted, no matter how your program crashes.
对代码维护来说，解除文件的链接有很多好处：不管您的程序是怎样崩溃的，文件都会被自动删除。