那方砖也不过是在欧式空间里存在吧。否则,只有在没有物质存在的空间里,该空间才会是平直的,否则要弯曲了。
那方砖也不过是在欧式空间里存在吧。否则,只有在没有物质存在的空间里,该空间才会是平直的,否则要弯曲了。
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