VOA慢速听力(022)搜索结果-280文秘网

#VOA慢速听力(022) 搜索结果

VOA慢速听力(022)
ThecrewoftheSpaceShuttleDiscoveryrepairedtheHubbletelescopeinDecember.Therepairsincludedreplacingthefailedgyroscopes,andaddinganewputerandnewrecordingequipment.Theastronautsalsoaddednewmaterialtoprotectthet
05-07

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