当然，转动惯量是,怎么也比不上太阳的，因为半径太小,而转动惯量,与半径的平方有关。
So, of course, the moment of inertia is extremely modest compared to the sun, because the radius is so small and the moment of inertia goes with the radius squared.
肯定是，与时间惯量有关，再次，它与材料无关，还有半径和长度无关。
It has to do, of course, with the moment of inertia, but again, it's independent of mass, radius and length.
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