Germination data is needed to determine whether or not a given lot of pollen is sterile or very weak . 为了确定所收到的花粉是否不育或发芽力很弱，必须有花粉发芽的资料。
He asserts positively that their fertility never increases, but generally decreases greatly and suddenly . 他肯定地说，它们的能育性不但没有增高反而一般却突然大大地降低。
I have taken some pains to ascertain the degree of fertility of some of the complex crosses of rhodoendrons . 我曾费相当力量，来探究杜娟花属的若干复杂杂交的能育性的程度。
Trichomoniasis is a contagious, venereal disease of cattle characterized by sterility, pyometra and abortion . 滴虫病是牛的一种接触传染的性病。以不育、子宫积脓和流产为特征。
His abundance and ability to proliferate and survive have set man forth in the environment by the billions . 人类的众多以及人类的多育能力和长寿，使人类在其环境中发展到数十亿。
With plants we have conclusive evidence that the sterility of crossed species must be due to some principle . 在植物方面，我们已有确实的证据，表明杂交物种的不育性一定是由于某种原理而起。
When a race of plants is once pretty well established, the seed-raisers do not pick out the best plants . 当一个植物品种已经育成以后，育种的人，并不是在子苗生长的时候，把最优秀的植物拣出。
These forms are highly sterile, as would be expected of triploids and of autotetraploids derived from basic deploids . 这些类型都是高度不育的，正如由基本的二倍体衍生三倍体和同源四倍体一样。
No one in anjou had better hearing or could speak the local dialect more clearly than the wily winegrower . 在安育地区，对当地的土话懂得那么透彻，讲得那么清楚的，谁都比不上这狡狯的葡萄园主。
