Yes, you need write permission to delete a file.

是的，要删除一个文件，您需要写权限。

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The Listing 27 snippet shows how to delete a file from external memory.

清单27中的代码片段展示了如何从外部内存删除文件。

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Hold the Shift key when clicking the delete button to permanently delete a file.

按住shift键的同时点击删除按钮可以永久删除文件。

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Look for a line in the file containing mscdex.exe and delete everything up to it, so that the line begins with mscdex.exe. (You can remove all subsequent lines from the file, too.) Save the file.

CNN: Top 50 Windows tips