这四轮马车转向现在看起来容易是咱们已经生活在已经有的时代，古代中国不会轻易造出来只能等到西方传入

来源: aebny 于 2018-06-15 10:36:11 [旧帖] [给我悄悄话] 本文已被阅读：次

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