本论文采用常规生物学方法、显微和超微组织学方法，对中国团扇鳐的年龄和生殖特性进行了研究；

Here, the age and the reproductive characteristics of P. sinensis are studied with common biological method, microstructure and ultrastructure method;

她通身是黑色。旗袍镶着灰银色的花边。她拿着一把团扇，挂在手指上，走进来，很自然地望着四凤。

Cheongsam is mounted with silvery lace. she has a round fan in the hand, hang it on the finger, she comes in and looked at Sifeng naturally.