- 问题详情:Drawingsofhumancoloniesonotherplanetsoftenpicturetheentirecommunityunderaglassorplasticbubble.Thebubbleisintendedtocreateanatmospherewithadequateoxygenandotheressentialelements.Butsimilarbubble-likestructureshavealsobeenconstructedonearth.One...
- 27392