If you spin a top, that we know that the top will not last very long because of friction.

如果你转一个陀螺，你会发现因为摩擦力，陀螺不会永远旋转。

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They love to spin a top on the ice and watch it rotating.

他们喜欢把一个陀螺转起来并看着它在冰上转个不停。

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They love to spin a top on the ice and watch it rotating.

他们喜欢把一个陀螺转起来并看着它在冰上转个不停。

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