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。
Embryonic Stem cells(ES)can be derived from the early stage embryos of mammiferous animals.
从哺乳动物早期发育阶段的胚胎中可以得到胚胎干细胞。
It is said that the disease is caused by abnormal development on endolymphatic duct in early embryonic stage, and the principal inducement is infectious factor.
认为该病为胚胎发育性疾病，其发生与胚胎早期内淋巴管发育障碍有关，感染是其主要诱因。
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