Because the passwd program cannot be written to by the user, and is very constrained in what it allows the user to do, this setup is usually safe.
因为用户不能编写passwd程序，而且它对允许用户执行的操作有严格限制，所以这个设置常常是安全的。
FOCAL was originally written for the PDP-8 by Richard Merrill and could run in a system with only 3000 words of memory (12 bits), with 1000 words for the user program.
FOCAL最初是RichardMerrill为PD P - 8编写的且运行在只有3000字内存(12位)和1000字用于用户程序的系统中。
The performance of the federated system is comparable to the performance of some existing user-written application program that implements the same distributed query
联邦系统的性能是否与一些已有的用户编写的实现相同分布式查询的应用程序的性能相当。
Serial 16-bit DAC8550 successful application of the user manual and debug the program, C can be applied to any written compilation environment.
串行16位 DAC8550应用用户手册和调试成功的程序，C写的可以应用于任何编译环境。
Its application program is written into user memory by RS232 string port, which can ensure no dropout when power is suddenly shut down.
应用程序由RS2 32串口写入用户存储器，确保电源消失后程序不会造成任何丢失；
The optimized design program was written by APDL and the user interface was written by UIDL.
应用APDL编制了优化设计程序，应用UIDL编制了用户用界面。
The optimized design program was written by APDL and the user interface was written by UIDL.
应用APDL编制了优化设计程序，应用UIDL编制了用户用界面。
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