Embryonic stem cells are the source of every cell, tissue and organ in the body.
身体中的每一个细胞，组织和器官都来源于胚性干细胞。
Animal cells lose their totipotency at an early stage in embryonic development.
动物细胞在胚胎发育的较早阶段便失去了其全能性。
Few question the medical promise of embryonic stem cells.
很少人会质问胚胎干细胞的医疗前景。
Few question the medical promise of embryonic stem cells.
很少人会质问胚胎干细胞的医疗前景。
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