In the second stage, the primary follicles develop into secondary and eventually tertiary, or graafian follicles.

第二阶段，初级卵泡形成次级卵泡，最终形成第三极卵泡，即格拉夫卵泡。

Meanwhile, the primordial follicle turns into a primary follicle, meaning that the follicular cells that surrounding the primary oocyte develop into granulosa cells.

与此同时，包围初级卵母细胞的滤泡细胞分化为颗粒细胞，使始基卵泡变为初级卵泡。

Other activated B-cells go to the center of a primary follicle in the lymph node and they differentiate into B-cells called centroblasts and start to proliferate or divide.

其它活化的B细胞进入淋巴结的初级滤泡中心，然后分化成中心母细胞，并开始增殖或分裂。

The second stage of follicular development begins for a few lucky primary follicles with the first menstrual cycle in puberty, and a few more primary follicles go into the second stage with each subsequent menstrual cycle.

少数幸运的初级卵泡可以随着青春期第一次月经周期进入第二阶段，还有更多的卵泡也幸运地随着，接下来的月经周期进入第二阶段。