amphinucleus

例句：

1. 1. The amphinucleus is a small, rounded structure located at the base of the ovary in many animals.
   在许多动物中，无核体是一种位于卵巢基部的小而圆的结构。
2. 2. In this case, the amphinucleus is responsible for controlling the growth and development of the embryonic stem cells.
   在这种情况下，无核体负责控制胚胎干细胞的生长和发育。
3. 3.The amphinucleus plays a crucial role in the formation of the germline and the development of the reproductive system.
   无核体在形成生殖系和发育生殖系统方面起着至关重要的作用。