In human reproduction,one female egg is usually fertilized by one sperm.

人体生殖过,个精子使个卵子受精。

The fish, smallmouth and largemouth bass, were male but neertheless carried immature eggs.

这种小口黑鲈和黑鲈为雄性，却带有未成熟的卵子。

Only one sperm fertilises an egg.

只有个精子使卵子受精。

To a certain degree, sperm head membrane maybe is the key factor to the androgenesis of the gynogenetic silver crucian carp eggs.

某种度上表明：精子膜蛋白可能是雌核发育银鲫卵子进行雄核发育的关键因素。

The secondary oocyte now divides again into two new cells of unequal size: a relatively large ootid (mature egg cell) and a minute second polar body.

此时，次级卵母细胞成两个大小不对等的新细胞：个相对很大的卵子（成熟卵细胞）和个微小的次级极体。