哈哈，我也不知道有多少個三葉蟲的種類被發現過。它們已經絕滅了，就像侏羅紀時代的恐龍化石。

來源: 雞鳴寺過客於 2023-03-17 09:15:20 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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