These are cells that I that were obtained either from a more developed embryo, past the blastocyst stage.

这些细胞是我从,发育的更成熟的一些胚胎中提取的,这些胚胎已经过了囊胚期了

耶鲁公开课 - 生物医学工程探索课程节选

The cells of this cluster inside next to the fluid filled cavity is a region of the blastocyst called the inner cell mass.

而这簇细胞的内侧,毗邻于充满液体的空腔的一侧,这些细胞在囊胚中称为内群细胞

耶鲁公开课 - 生物医学工程探索课程节选