Mutexes are available in the kernel as a way to accomplish semaphore behavior.
在内核中可以使用互斥锁来实现信号量行为。
Mutexes are necessary tools for threaded programs, but they can't do everything.
互斥对象是线程程序必需的工具，但它们并非万能的。
Mutexes are one method of synchronizing threads, however, there are many other ways.
互斥是一种同步线程的方法，但也有其它的方法。
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