translation.en: It postulates a vast and rapidly growing number of universes existing in parallel, mutually undetectable, except through the narrow porthole of quantum mechanical experiments.
translation.zh: 它假设了存在着数目巨大并且在不断增加的平行宇宙， 并且它们之间是无法互相探测的， 除非通过精妙的量子力学实验。