大約每一萬平方公裏一顆衛星.高度幾百公裏,所以抬眼一看,可以同時看到幾顆,還有緩存.

來源: 最接近太陽的人於 2023-09-05 13:16:46 [舊帖] [給我悄悄話] 本文已被閱讀：次

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