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北斗卫星导航系统将在轨升级

intermediate头条1 min read
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Key Vocabulary

导航系统dǎo háng xì tǒng
北斗běi dòu
guǐ
jiāngHSK4
升级shēng jíHSK5

to go up by one grade; to be promoted

卫星wèi xīngHSK7

satellite

zàiHSK1

(of sb or sth) to be (located) at

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