first oocyte

例句：

1. 1. The study focused on the development of the first oocytes in the early stages of embryogenesis.
   该研究专注于胚胎早期阶段第一个卵细胞的发展。
2. 2.In humans, the first oocytes are produced by the ovaries before ovulation.
   在人类中，第一个卵细胞是在排卵前由卵巢产生的。
3. 3.The research aims to understand the role of the first oocyte in early embryonic development.
   这项研究旨在理解第一个卵细胞在早期胚胎发育中的作用。