Although there is no evidence for these multiverses, that has not stopped theorists from speculating about them.
尽管还没有有关多元宇宙的确凿证据，理论学家们还是在不停地揣摩它们。
Greene thinks the key to understanding these multiverses comes from string theory, the area of physics he has studied for the past 25 years.
格林尼认为理解多元宇宙的关键是弦理论。过去的25年间，他一直在研究弦理论。
Greene thinks the key to understanding these multiverses comes from string theory, the area of physics he has studied for the past 25 years.
格林尼认为理解多元宇宙的关键是弦理论。过去的25年间，他一直在研究弦理论。
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