你看不到黑洞地。除非你能直接看到x-ray

来源: 用户名被占用了于 2011-12-07 11:50:48 [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.