Just how many hidden dimensions exist depends on the theory, but some versions of the popular string theory for example, postulate we live in a 10 - or 11-dimensional universe.
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致力于统一引力定律和量子力学的弦理论家很久前就作出了存在另一维度的推测。
String theorists, who seek to unify the laws of gravity with those of quantum mechanics, have long predicted the existence of extra dimensions.