英语语法分析

The spermatogonium remained replicating activity of DNA during the developing stage.

在生后各发育阶段中，精原细胞始终保持DNA复制的能力。

It was difficult to distinguish oogonium from spermatogonium according to the shape and size of gonium under light microscope.

在光镜下难以根据性原细胞的形态和大小区分卵原细胞和精原细胞。

In order to study the general law on meiosis of Periplaneta Brunnea. Air-dried method was used to observe the chromosome of spermatogonium in different stages.

探讨褐斑大蠊减数分裂规律，运用空气干燥法对褐斑大蠊精原细胞第一次减数分裂染色体形态进行观察。