现在除了线程内核对象外。
事件内核对象是一种同步多线程的内核对象。
Event kernel object is a kind of kernel objects to synchronize threads.
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。
Many modern UNIX operating systems implement a many-to-few model when mapping user-level threads to kernel entities.
当用户空间线程调用了一个阻塞的系统调用时，内核执行对象也会在内核阻塞。
Whenever a user-level thread makes a blocking system call, the kernel execution vehicle it is using will become blocked in the kernel.
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。
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。
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.
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