其实星云就是些氢气氦气甲烷啥的轻物质，吓人的。

来源: 送赞干部于 2023-03-20 17:04:33 [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.