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在 DNA 中,每个碱基(A, T, C, G)恰出现 2 次的 8 碱基序列: 8!/(2!)^4 。
在 DNA 中,每个碱基(A, T, C, G)恰出现 2 次的 8 碱基序列: 8!/(2!)^4 。
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