Reverse mappings help the system continue to perform and scale well when large applications are placing huge memory demands on the kernel and multiple processes are sharing memory.
当大型应用程序向内核请求大量内存和多个进程共享内存时，反向映射帮助系统继续有效地运行和扩展。
These operating systems facilitate running multiple applications simultaneously and memory management is handled by the operating system.
这些操作系统都能够同时运行多个应用程序，并由操作系统自己来进行内存管理。
Mini-httpd handles multiple concurrent requests in a single system thread, while demanding little from its host in the way of memory or CPU.
mini - httpd可以在一个系统线程中处理多个并发请求，但是在主机上占用的内存或CPU很少。
This allowed the system to be distributed over multiple processors, either using shared memory directly as in most Mach messages, or by adding code to copy the message to another processor if needed.
这种设计有利于把系统分布到多个处理器之上，既可以像大多数Mach消息那样直接通过共享内存来传递，也可以在必要的时候增加一点代码把消息复制到别的处理器上。
Multiple processes have to use complex mechanisms provided by the operating system to share memory and file descriptors, as we will see in Chapters 15 and 17.
就像我们在17章和15章看到的那样，多进程不得不用复杂的机制去处理操作系统的共享内存和文件描述符。
Microcomputer control system can be according to the customers needed to multiple-unit memory storage, don't cutting die setting again when replace the cutter.
微电脑控制系统可根据工作所需刀模形态进行多组记忆侟储，更换刀模时，可不必再重新进行刀模设定。
Microcomputer control system can be according to the customers needed to multiple-unit memory storage, don't cutting die setting again when replace the cutter.
微电脑控制系统可根据工作所需刀模形态进行多组记忆侟储，更换刀模时，可不必再重新进行刀模设定。
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