評論未看到，這幅圖說明什麽？不懂，請賜教。

來源: 龍劍於 2020-01-12 09:08:57 [博客] [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.