如果宇宙大爆炸曾经发生过一次，为什么就不能发生许多次，甚至无限多次？事实上，就像虚粒子可以从空无的空间中不断产生，初始宇宙的那种微小时空泡泡也可以时时突然产生。当然，这些宇宙中的大多数会立即自行消失，如同虚粒子那样。而那些剩下的没有消失的宇宙，最终会变成 If the Big Bang once happened once, why can’t it happen many times or even infinitely many times? In fact, just as virtual particles can continue to emerge from an empty space, the micro-hour bubbles in the original universe can suddenly be generated from time to time. Of course, most of these universes will immediately disappear on their own, like virtual particles. And those remaining non-disappearing universes will eventually become