请用一句话描述AI是什么，并将其翻译成英文，然后用Markdown格式展示。
user
AI是模拟和执行人类智能活动的技术系统，能够通过学习、理解、推理和自我修正来完成特定任务。  
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AI is a technological system that simulates and performs human cognitive activities, capable of accomplishing specific tasks through learning, understanding, reasoning, and self-correction.
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AI is a technological system that simulates and performs human cognitive activities, capable of accomplishing specific tasks through learning, understanding, reasoning, and self-correction.
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assistant