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。
If you spin a top, that we know that the top will not last very long because of friction.
我们必须提醒自己不要被外物所转，不要成为木偶和陀螺。
We must warn our self not to be changed by the external material and not to become a puppet or a spinning top.
我们必须提醒自己不要被外物所转，不要成为木偶和陀螺。
We must warn our self not to be changed by the external material and not to become a puppet or a spinning top.
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