设置一个进程的当前工作目录的地方没有写权限。

The process sets a current working directory where it does not have write permissions.

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这样，宿主既能够控制向特定域中的代码授予的权限集，也能为基于角色的安全策略设置当前线程的主体和默认的主体。

This enables the host to control the set of permissions granted to code in a particular domain and to set both the current thread's principal and the default principal for role-based security.

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设置对指定文件和目录的指定访问权限，同时用一组新路径替换指定访问权限的当前状态。

Sets the specified access to the specified files and directories, replacing the current state for the specified access with the new set of paths.

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