Many modern UNIX operating systems implement a many-to-few model when mapping user-level threads to kernel entities.

很多现代的UNIX操作系统实现了一个多对一的模型，用来映射用户空间的线程到系统内核对象。

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Applications can be designed to have user-level threads that are scheduled to work by the application or by the pthreads scheduler in libpthreads.

应用程序在设计上可拥有多个用户级线程，并将它们计划为由应用程序或libpthread中的pthread调度程序处理。

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In this model, an arbitrarily large number of user-level threads is multiplexed onto a lesser number of kernel execution vehicles. Kernel execution vehicles are also known as virtual processors.

在这个模型中，任意多数量的用户空间线程复用少量的内核执行对象，内核执行对象即为虚拟处理器。

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