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The Hubble一只望远镜的革命英语美文

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TheHubble一只望远镜的革命Whenmostpeoplethinkofspace,whatcometomindarenameslikeJohnGlennandNeilArmstrong.Whenscientiststhinkaboutspace,thenamethatcomestomindisHubble,aspacetelescopewesentonatwenty-year...

Trouble with the Hubble美文欣赏

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TroublewiththeHubble哈勃望远镜的困境TheHubbletelescopewaslaunchedintospacebyNASAonApril20,1990atacostofoverabilliondollars.RightfromthestarttherewastroublewiththeHubble.Thepicturesitsentuswereverydisa...