绒毛膜：在爬行类动物、鸟类及哺乳类动物中包含胚胎的外膜，在有胎盘哺乳动物中与胎盘的发育有关。
Chorion: the outer membrane enclosing the embryo in reptiles birds and mammals. in placental mammals it contributes to the development of the placenta.
绒毛膜：在爬行类动物，鸟类及哺乳类动物中包含胚胎的外膜，在有胎盘哺乳动物中与胎盘的发育有关。
Chorion: the outer membrane enclosing the embryo in reptiles birds and mammals. in placental mammals it contributes to the development of the placenta.
如果你仍对肝细胞研究持有反对态度，请多读有关此类研究的益处和非胚胎肝细胞研究情况的介绍。
If you're against stem cell research, read a little more about the benefits of stem cell research and the kinds of stem cell research that don't use embryos.
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