harmonic-mean
柯林斯詞典
1. N the reciprocal of the arithmetic mean of the reciprocals of a set of specified numbers: the harmonic mean of 2, 3, and 4 is 3( + + )–1 = 3 調(diào)和平均值
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<b id="o9ur4"></b> 1. N the reciprocal of the arithmetic mean of the reciprocals of a set of specified numbers: the harmonic mean of 2, 3, and 4 is 3( + + )–1 = 3 調(diào)和平均值