A LISP program can read LISP statements from a text file and execute them as if they were part of the original program.
LISP程序可以从文本文件中读取语句，并且好像它们是原始程序一部分一样执行它们。
When a program tries to read a file, small portions of that file are read from several disks in parallel.
当一个程序试图读取某个文件时，可以并行地从多块磁盘上分别读取这个文件的某些部分。
Fine-grained access control goes beyond granting or denying the right to execute a program or read a data 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。
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