科學是固定所有變量，隻變動一個變量觀察結果。偏偏人體變量太多不能固定，無法比較。

來源: 羽衣甘藍於 2017-11-10 19:16:42 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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