氦气不全部充满气球飞不到 2 万米，更没戏飞几千公里。

来源: 三河匹夫于 2023-02-06 21:14:46 [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.

Change Ad Consent