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美国发射一颗间谍卫星

文章来源:admin    时间:2019-01-23

  A powerful Delta1 4 Heavy rocket carrying a U.S. spy satellite lifted off Saturday from California.   一枚德尔塔4重型火箭搭载着一颗间谍卫星周六在美国加州发射升空。
    The rocket propelled the National Reconnaissance Office satellite from Vandenberg Air Force Base at 11:10 a.m. Pacific time, arcing over the Pacific Ocean west of Los Angeles as it headed toward space.   The outer boosters of the rocket separated about four minutes into flight, followed shortly by separation of the central first-stage booster and successful ignition of the upper stage.   As is customary with classified payloads, United Launch Alliance webcast the liftoff only until the aerodynamic fairing covering the payload was discarded.   Details of the mission, dubbed2 NROL-71, were not released.   The launch had been repeatedly delayed since late last year for various reasons including a hydrogen leak, high winds and a problem with ground communication equipment.   The National Reconnaissance Office is responsible for U.S. intelligence satellites.   United Launch Alliance is a joint3 venture of Lockheed Martin and Boeing.   The Delta 4 Heavy stands 233 feet (71 meters) tall.
1 delta      n.(流的)角洲 参考例句:
  • He has been to the delta of the Nile.他曾去过尼罗河三角洲。
  • The Nile divides at its mouth and forms a delta.尼罗河在河口分岔,形成了一个三角洲。
2 dubbed      v.给…起绰号( dub的过去式和过去分词 );把…称为;配音;复制 参考例句:
  • Mathematics was once dubbed the handmaiden of the sciences. 数学曾一度被视为各门科学的基础。
  • Is the movie dubbed or does it have subtitles? 这部电影是配音的还是打字幕的? 来自《简明英汉词典》
3 joint      adj.联合的,共同的;n.关节,接合处;v.连接,贴合 参考例句:
  • I had a bad fall,which put my shoulder out of joint.我重重地摔了一跤,肩膀脫臼了。
  • We wrote a letter in joint names.我们联名写了封信。

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