And we learn about the maternal grandparents, the paternal grandparents, and the brothers and sisters, aunts and uncles, and what each one of them did.

我们学习了外祖父母，祖父母，兄弟姐妹，叔舅姨姑，还有他们曾做过什么。

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He revises it away from that to the more generalized, fundamental, but also very personal figure of the mother and the maternal.

但对母亲以及母性来说，这也是一很个人化的角色。

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These cells around the outside form the interface, the placenta, where the maternal blood circulation meets the embryonic circulation and nutrients are passed back and forth that way in a very highly regulated and important way.

外层的细胞形成接触面,即胎盘,是母血与胎血,进行血液交换,及营养物质交换的场所,整个过程高度有序并且非常重要

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