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- 問題詳情：Drawingsofhumancoloniesonotherplanetsoftenpicturetheentirecommunityunderaglassorplasticbubble.Thebubbleisintendedtocreateanatmospherewithadequateoxygenandotheressentialelements.Butsimilarbubble-likestructureshavealsobeenconstructedonearth.One...
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