为了预测可靠性，一个可靠的阀门设计必须通过临界操作条件下的应力分析和功能合格测试。

In order to predict reliability, a sound valve design must be backed up up by a stress analysis and functional qualification testing under critical operating conditions.

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临界段操作时坚持互斥锁(mutual exclusion)原则(当一个线程处于临界段中时，其他所有线程都不能进入临界段)。

Critical sections operate on the principle of mutual exclusion (when a thread is within a critical section, all other threads are excluded from entering).

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什么是关键操作和临界状态?。

What are the critical Operations and conditions?

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