天文學的實驗從前是觀察，是屬於科學的。

來源: fourwaves 於 2019-08-25 14:00:18 [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.