匀速圆周运动发生在，当物体沿着一个圆环滚动，速率恒定的情况下。

Uniform circular motion occurs when an object goes around in a circle and when the speed never changes.

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匀速圆周运动发生在，当物体沿着一个圆环滚动，速率恒定的情况下。

Uniform circular motion occurs when an object goes around in a circle and when the speed never changes.

youdao