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糯米猫000
谢谢老师
听友305202212
Though research and development is moving ahead on the Hyperloop, an extremely high speed form of magnetic rail transportation, it's still unknown if it will make financial sense to build hyper loop passenger networks.
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听友305202212
Though research and development is moving ahead on the Hyperloop, an extremely high speed form of magnetic rail transportation, it's still unknown if it will make financial sense to build hyper loop passenger networks.