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In Einstein's general relativity the structure of space can change but not its topology. Topology is the property of something that doesn't change when you bend it or stretch it as long as you don't break anything.
在爱因斯坦的广义相对论中，空间的结构可以改变，但不能改变它的拓扑结构。拓扑是一种属性，当你弯曲或拉伸它时，只要你没有破坏任何东西，它就不会改变。