Module3JourneytospaceUnit1Hasitarrivedyet?LeadinTalkaboutthequestions.Doyouknowanythingabouttheuniverse?Istheearthtravellingintheuniverse?SpaceMilkyWaysolarsystemspacecraftspaceshuttlespacestationmessagesatelliterocketastronautstargalaxySpaceEarthEarthmoonnewsplanetreachyetn.地球n.月亮，月球n.新闻，消息n.行星v.到达；抵达adv.还，尚PresentationWordsandexpressionsmodelMarsspaceshipdiscoverastronau...
