We cannot say how much of the difference is the result of selectivity of migrants at the time of move and how much results from lowered fertility after moving to the urban setting.
我们无法说这个差距在多大程度上取决于移民时的选择，多大程度上取决于移民城市后生育力的下降。
And the difference was clear, with fertility declining by up to seven per cent with each extra year on a man's age between 41 and 45.
区别很明显，处于41岁到45岁之间的男人，每长一岁，生育能力下降的最大幅度为7%。
There was no significant difference in fertility rate, cleavage rate, high-quality embryonic rate and graftage embryonic number between these groups(P>0.05).
各组间受精率、卵裂率、优质胚胎率、移植胚胎数比较差异均无显著性（P>0.05）。
The self-fertility of Peiai64S lines collected from the same source but different years were compared and the difference was also found.
另外，对历年培矮64S在气候箱内鉴定的自交结实率的结果进行分析比较，发现不同年度间繁育的培矮64S光温反应特性也存在差异。
The result showed that in the condition of high temperature, there existed obvious difference among the tassels' fertility of these maize materials.
结果表明，高温条件下，材料间的雄花育性存在着明显的差异。
The result showed that in the condition of high temperature, there existed obvious difference among the tassels' fertility of these maize materials.
结果表明，高温条件下，材料间的雄花育性存在着明显的差异。
应用推荐