Lets assume, we would double, triple, quadruple, etc. Bobs world and stack these copies on top of each other. Bob would never notice, as long as each copy is just a “shallow” copy, meaning that each movement in the fundamental domain (the original world) is mirrored in the copies. In this case, we would have a covering space of Bobs world, and the original world would be the base space.
63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54，更多细节参见体育直播
Regular vs Irregular Palettes，详情可参考safew官方下载
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04。体育直播是该领域的重要参考