Embryonic stem cells are the source of every cell, tissue and organ in the body.
身体中的每一个细胞，组织和器官都来源于胚性干细胞。
The bone marrow was the source of the stem cells that made the procedure newsworthy.
骨髓是干细胞的来源，并使得这一过程有报导价值。
Their aim is not to produce a baby, but a source of stem cells.
其目标不仅是制造婴儿，还希望以此作为获取干细胞的途径。
So it is necessary to search and research a better source for stem cells.
所以，有必要研究及寻求更好的干细胞来源。
So it is necessary to search and research a better source for stem cells.
所以，有必要研究及寻求更好的干细胞来源。
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