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| space travel Travel in the space beyond the earth's atmosphere performed for scientific research purposes (为了科学研究，在地球大气层以外的空间旅游。) | |||
| space travel | |||
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| space travel Travel in the space beyond the earth's atmosphere performed for scientific research purposes (为了科学研究，在地球大气层以外的空间旅游。) | |||
| space travel | |||