So here comes the work that Walter Lewin has to do when we go from infinity to that point, which is capital R, radius, from this object.
所以，这就是,我要做的功,从无穷远处移到这点，也就是距离这个物体，距离为R处。
If you were here, and you go back to infinity, you reach exactly that speed, so if you fall in from infinity that is exactly the speed at which you reach the neutron star.
然后回到无穷大，你达到那个速度，如果你从无穷远处，以这个速度落到，中子星上，很明显。
As Lewis Carroll showed in Alice in Wonderland: "Would you tell me, please, which way I ought to go from here?"
《艾丽丝漫游奇境记》中有这样一段对话：“请您告诉我，在这里我应该走哪条路 ?。
As Lewis Carroll showed in Alice in Wonderland: "Would you tell me, please, which way I ought to go from here?"
《艾丽丝漫游奇境记》中有这样一段对话：“请您告诉我，在这里我应该走哪条路 ?。
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