When a particle moves in a circle, it has an acceleration towards the center of this size, v^2 over R.

当一个质点在圆周上运动时,它有一个指向圆心的加速度,v^2 / R

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That means the acceleration is pointing towards the center of the circle and it has a magnitude a.

也就是说加速度,始终指向圆心,其模长为 a

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It tells you when a particle moves in a circle, it has an acceleration in a negative R direction, namely directed towards the center.

它告诉你当一个物体在圆周上运动时,它有一个在 -R 方向的加速度,也就是说是直接指向圆心的

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v^2 / R is the acceleration directed towards the center of that circle.

^2 / R 就是指向那个圆心的加速度

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