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.
「我們以前每個月會外出吃兩次飯,」住在伊朗第二大城市伊斯法罕(Isfahan)的瑪爾珍(Marjan) 說,「現在我們根本不能去了。我們必須把那筆錢省下來付房租。」
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На шее Трампа заметили странное пятно во время выступления в Белом доме23:05
当地时间3月2日,法国外交部长巴罗在巴黎举行的新闻发布会上表示,法国没有得到通知,也没有参与美国和以色列发起的军事行动。只有通过联合国安理会审议,此类行动才可能具备合法性。