请用英文详细解释什么是人工智能以及其主要应用领域，且答案不得超过3句话，使用第三人称陈述方式表述。
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Artificial intelligence (AI) refers to the simulation of human intelligence in machines, enabling them to perform tasks requiring cognitive abilities. Its main applications include natural language processing, computer vision, and autonomous systems, enhancing efficiency in various industries and everyday life.
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