布莱恩解释了如何最大的动力,重力,达到了对公里,其中最轻的引力触摸包围在一个神秘的彗星云太阳系千亿。
Brian explains how its greatest power, gravity, reaches out for hundreds of billions of kilometres, where the lightest gravitational touch encircles our solar system in a mysterious cloud of comets.
布莱恩解释了如何最大的动力,重力,达到了对公里,其中最轻的引力触摸包围在一个神秘的彗星云太阳系千亿。
Brian explains how its greatest power, gravity, reaches out for hundreds of billions of kilometres, where the lightest gravitational touch encircles our solar system in a mysterious cloud of comets.
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