英语语法分析

The spermatid differentiation can be divided into five stages.

精细胞的分化可分为五个时期。

Early spermatid was oval in shape, with a big and round nucleus;

早期精细胞呈椭圆形，细胞核大而且圆，核膜不规则，多呈锯齿状；

The secondary spermatocytes become the spermatid quickly by short time development.

次级精母细胞经短暂的发育过程很快形成精细胞。