Cutting is a physical action. In a narrow sense, cutting refers to using sharp instruments like knives to cut through objects with lower hardness, such as food or wood. In a broader sense, cutting refers to using tools such as machine tools or flames to sever objects by applying pressure or high temperature. In mathematics, there is also the derived concept of a "cutting line," which refers to a straight line that can divide a plane into several parts. Cutting plays an important role in people's production and daily life.
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