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sputnik

noun
🔊/ˈspʌtnɪk/, 🔊/ˈspʊtnɪk/
🔊/ˈspʌtnɪk/, 🔊/ˈspʊtnɪk/
 (from Russian)
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  1. a satellite of the type that was put into space by the Soviet Union（苏联）人造地球卫星，人造卫星Topics Spacec2
    Word OriginRussian, literally ‘fellow traveller’.