The.Universe.S02E08.Space.Travel.2008.BluRay.720p.x264.AC3-CMCT
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本视频探讨了人类探索太空的挑战与未来技术，包括成本、辐射危害、微重力对人体的影响，以及可能实现的先进推进系统和深空旅行的前景。
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