POSIX provides the mutex function to create critical sections that enforce exclusive access to an object (a piece of memory) by a single thread.

POSIX 提供了互斥函数来创建临界区，用于实施单线程对对象（一块内存）的独占访问。

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Organophosphates have long worried scientists and regulators because they irreversibly block an enzyme critical to nerve function in both insects and humans.

长久以来，科学家们和监管机构对有机磷酸酯都很担忧。 因为有机磷酸酯会对昆虫和人类的神经活动中一种很重要的酶产生不可逆的阻碍。

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Penfield devised a technique to assess whether the area to be damaged was critical for brain function.

Penfield发明了一种用以评估待损毁区域对于脑功能是否关键的方法。

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It is not enough to leave this critical function to presidents and prime ministers just because they have technical training.

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The shape that the amino-acid chain wraps itself up into is critical to its function.

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But the subunits most critical to its function are mitochondrial in origin.

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