P cell

例句：

1. 1. The P cells are responsible for the production of insulin.
   P细胞负责胰岛素的生产。
2. 2. The study focused on the role of P cells in cancer development.
   该研究专注于P细胞在癌症发展中的作用。
3. 3. P cells have been found to play a crucial role in immune responses.
   研究发现P细胞在免疫反应中起着关键作用。