A single-cell organism divided into two volumes structurally identical and internally similar but opposite.

一个单细胞生物体的结构分为两卷相同或相似，但内部相反。

youdao

The researchers added the changed DNA to yeast -- a simple,single-cell organism.

VOA: special.2010.07.20

During development of the embryo it goes from being a single cell, the fertilized egg, to being a multi-cellular organism with billions of cells in it.

胚胎的发育,始于一个单一细胞,即受精卵,直到形成一个以十亿计数量的细胞构成的,多细胞有机体

耶鲁公开课 - 生物医学工程探索课程节选