trophosome

例句：

1. 1. The trophosome is the first stage of a developing embryo.
   囊胚是胚胎发育的第一阶段。
2. 2.During fertilization, the egg and sperm fuse to form a trophosome.
   受精时，卵子和精子融合形成囊胚。
3. 3. The trophosome contains the nucleus and the cytoplasm of the early embryo.
   囊胚包含早期胚胎的核和胞质。