实例证明地球 球体
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实例证明地球球体实例证明地球球体实例证明地球球体iftheearthisflat,thenifuwatchthesailsonthebeach,uwouldseethesailcompletely,b
实例证明地球 球体
实例证明地球 球体
实例证明地球 球体
if the earth is flat,then if u watch the sails on the beach,u would see the sail completely,but then in reality,u can only see the top of sail at a far distance,then the whole thing if the sail comes closer