写权限意味着用户使用该权限能够在目录中创建或者删除文件。
Write permission means a user with that permission can create or delete files in the directory.
在整个目录(树状结构)，而不是单个文件中运行合并管理器，会让您意识到，该目录下的所有文件，哪些是添加的，删除的，或者修改的。
Running the merge manager on a whole directory (tree) instead of a single file will make you aware of all files in that directory that have been added, deleted, or modified.
在目录或者文件系统中设置或者删除继承，对于现有的文件不会产生任何影响。
Setting or removing inheritance on a directory or a file system has no effect on the existing files.
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