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当物体由一种运动状态变为另一种运动状态,或某物理量的变化趋势发生改变时,可能存在一个过渡的转折状态,该状态通常称为临
When an object changes from one movement state to another, or when the change trend of a physical quantity changes, there may be a transitional state of transition, which is often referred to as