史波尼克：苏联发射的一系列人造地球卫星，标志着太空时代的开始。

Sputnik: Any of a series of Earth-orbiting spacecraft whose launching by the Soviet Union inaugurated the space age.

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史波尼克：苏联发射的一系列人造地球卫星，标志着太空时代的开始。

Sputnik: Any of a series of Earth-orbiting spacecraft whose launching by the Soviet Union inaugurated the space age.

youdao