除了数据读取程序之外，另一个函数print _ file用于输出文件的所有内容。
In addition to the data reader, another function, called print_file, is used to print the entire contents of the file.
细粒度访问控制不只是授予或拒绝执行程序或读取数据文件的权限。
Fine-grained access control goes beyond granting or denying the right to execute a program or read a data file.
在11.1中，备用服务器只允许应用程序读取数据。
In 11.1, the secondary servers only allowed applications to read data.
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