不過臨界值的話，肯定特征不明顯；另外分類法也有好幾種，除了分五類的，也有隻分三，四類，或者多達七，八類的分法

來源: 詠月於 2020-04-21 13:28:38 [舊帖] [給我悄悄話] 本文已被閱讀：次

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