中国北斗卫星导航2020年完工

时间：2019-06-06 06:53:50

（单词翻译:单击）

China's BeiDou-3 system is expected to be completed in 2020, with a total of 35 satellites, researchers at a conference on the BeiDou Navigation Satellite System (BDS) said.
 
中国北斗卫星导航系统将于2020年完工，届时共有35颗卫星运行。
 
China has deployed1 three systems, BDS-1, BDS-2 and BDS-3, to provide accurate positioning and navigation services to the world, said Jin Shuanggen, a researcher at Shanghai Astronomical2 Observatory3, Chinese Academy of Sciences, at the second China (Nanjing) BeiDou Satellite Navigation Application Expo and Beidou Summit Forum4.
 
"Traditional satellites navigation service is hardly available in the interior of buildings, underground, underwater and other locations. The BDS system provides better accuracy in these locations," Jin said.
 
The BDS system, independently constructed and operated by China, currently has 38 in-orbit satellites including 18 BDS-2 and 20 BDS-3.
 
As a space infrastructure5 of national significance, the BDS provides all-time, all-weather and high-accuracy positioning, navigation and timing6 services to global users, according to a white paper on the system.
 
"BDS will play a large role as it is used in different scenarios7 including smart city, agriculture and meteorology, autopilot, and intelligent transportation," said Jing Guifei, dean of BeiDou Belt and Road School of Beihang University.

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1 deployed 4ceaf19fb3d0a70e329fcd3777bb05ea     
（尤指军事行动）使展开( deploy的过去式和过去分词 )； 施展； 部署； 有效地利用
参考例句：
  • Tanks have been deployed all along the front line. 沿整个前线已部署了坦克。
  • The artillery was deployed to bear on the fort. 火炮是对着那个碉堡部署的。
2 astronomical keTyO     
adj.天文学的，（数字）极大的
参考例句：
  • He was an expert on ancient Chinese astronomical literature.他是研究中国古代天文学文献的专家。
  • Houses in the village are selling for astronomical prices.乡村的房价正在飙升。
3 observatory hRgzP     
n.天文台，气象台，瞭望台，观测台
参考例句：
  • Guy's house was close to the observatory.盖伊的房子离天文台很近。
  • Officials from Greenwich Observatory have the clock checked twice a day.格林威治天文台的职员们每天对大钟检查两次。
4 forum cilx0     
n.论坛，讨论会
参考例句：
  • They're holding a forum on new ways of teaching history.他们正在举行历史教学讨论会。
  • The organisation would provide a forum where problems could be discussed.这个组织将提供一个可以讨论问题的平台。
5 infrastructure UbBz5     
n.下部构造，下部组织，基础结构，基础设施
参考例句：
  • We should step up the development of infrastructure for research.加强科学基础设施建设。
  • We should strengthen cultural infrastructure and boost various types of popular culture.加强文化基础设施建设，发展各类群众文化。
6 timing rgUzGC     
n.时间安排，时间选择
参考例句：
  • The timing of the meeting is not convenient.会议的时间安排不合适。
  • The timing of our statement is very opportune.我们发表声明选择的时机很恰当。
7 scenarios f7c7eeee199dc0ef47fe322cc223be88     
n.[意]情节；剧本；事态；脚本
参考例句：
  • Further, graphite cores may be safer than non-graphite cores under some accident scenarios. 再者，根据一些事故解说，石墨堆芯可比非石墨堆芯更安全一些。 来自英汉非文学 - 环境法 - 环境法
  • Again, scenarios should make it clear which modes are acceptable to users in various contexts. 同样，我们可以运用场景剧本来搞清楚在不同情境下哪些模式可被用户接受。 来自About Face 3交互设计精髓

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