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第一颗GPS卫星

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A warm, clear look at the first GPS satellite launched 1978. Learn how NAVSTAR Block I used atomic clocks and careful math to begin a quiet revolution that still guides phones, rescue teams, and daily life. 儿童科学

第一颗GPS卫星发射（1978年）：NAVSTAR的静悄悄革命

温暖而清晰地了解1978年发射的第一颗G…

Roshni Sawhny

Roshni Sawhny

27 3 月, 2026 •
1 分钟阅读

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