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近年来,科学家提出的有关天梯(Space elevator)的设想,以其诱人的前景和较现实的可行性,吸引了整个航天界。因为天梯一旦建成,它就
In recent years, the idea put forward by scientists on the space elevator has attracted the entire space community with its attractive prospect and more realistic feasibility. Because the ladder once built, it is