在我怀第二胎的时候就没有余地去注意了。

With my second pregnancy I didn’t have the luxury to notice.

youdao

因没有把怀我胎的门关闭，也没有将患难对我的眼隐藏。

Because it shut not up the doors of my mother's womb, nor hid sorrow from mine eyes.

youdao

在一些地方，第三胎的男女比例会超过200：100.

The boy-girl ratio is above 200 for a third child in some places.

youdao

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

耶鲁公开课 - 生物医学工程探索课程节选