他们跋山涉水, 步行二百余公里, 来到了一个青山环抱的小村庄。
Across hills and rivers, they walked more than two hundred kilometres and arrived at a little hamlet nestling in the green mountains.
我们三个经常在一个邻居家的后院玩耍,院子周围是环抱的树林和零星分布的住家。
The three of us would often play in one of the neighbor's back yard.Woods as well as some scattered homes surrounded the yard.
我们三个经常在一个邻居家的后院玩耍,院子周围是环抱的树林和零星分布的住家。
The three of us would often play in one of the neighbor's back yard. Woods as well as some scattered homes surrounded the yard.
The cells of this surrounding sheet have become different in some way and they develop into the placenta and the extra embryonic tissues.
环抱在周围的这一层细胞,已经开始逐渐分化,最终成为胎盘,及额外的胚胎组织
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