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我的车很脏: 大坝附近还有另一个瀑布-Paaladaara Panchadara。 the problems are: 1) speed of light is constant; 2) time has direction; 3) the distance between origins of inertial systems can be veried。"几十年,是好事"。
我的车很脏: 大坝附近还有另一个瀑布-Paaladaara Panchadara。 the problems are: 1) speed of light is constant; 2) time has direction; 3) the distance between origins of inertial systems can be veried。"几十年,是好事"。