noun 下载 🔗分享 囊胚，胚囊。 An early form in the development of an embryo, consisting of a spherical layer of cells filled with fluid; a blastosphere. Examples : "In biology class, we learned that after fertilization, the cells of a developing embryo divide rapidly to form hollow balls called blastulas. " 在生物课上，我们学到，受精之后，发育中的胚胎细胞会迅速分裂，形成空心的球状结构，这种结构叫做囊胚（胚囊）。 biology organism anatomy physiology 与AI对话词汇游戏阅读练习
