如果气球不可控，放飞者事先算好了高空大气的流向，放飞后数日按计划随气流飞回原处。这技术更可怕了。也不知此气球是否呈水滴状

来源: 21-C 于 2023-02-03 16:36:05 [旧帖] [给我悄悄话] 本文已被阅读：次

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