用氢气没有问题，只要放飞的人不抽烟，放飞到气球进入平流层之前没雷暴就得，到1万米以上就没有雷暴了

来源: 天青水蓝于 2023-02-07 14:16:03 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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