现在的卫星可以看到任何建筑物及人员，何必要用气球呢？再说如此高度怎么控制的？

来源: FollowNature 于 2023-02-02 16:16:00 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.