... 非正态总体 nonnormal population 双正态总体 two normal population 单正态总体 single normal population ...
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Pollen fertility was observed in two successive selfing generations on a two-line sterility line, Zao S, which proved that the pollen fertility in the population showed a normal distribution.
通过早S连续两个世代花粉染黑率的观测，证实群体育性呈正态分布。
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