Sewall Wnight thought it desirable to weight each observation directly as the pollen frequency.
赛沃尔·劳埃特认为把每次观测直接加权作为花粉频率是可取的。
Changing temperature treatment could enhance the induction frequency of pollen embryoid.
变温处理可以提高花粉胚状体诱导频率。
The frequency distribution of characteristic value of the male cones and pollen is abnomal.
杉木雄球花及花粉特征值频率分布为偏态分布。
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