研究人员表示，他们能把从诊所或医院里获得的人类血液细胞重组成类似胚胎干细胞功能的细胞。
Human blood cells -taken at doctors' offices or hospitals -can now be reprogrammed into a state like embryonic stem cells, according to researchers.
胚胎干细胞的研究备受争议，原因是获得能够发育成为几乎人体所有组织的细胞，有损于人类胚胎。
Embryonic stem cell research is controversial because human embryos are destroyed in order to obtain the cells capable of developing into almost every tissue of the body.
因为从前没有人使用胚胎干细胞或者从干细胞中获得的细胞用于人自身，FDA会非常慎重。
Because no one has used embryonic stem cells, or the cells derived from these stem cells, in people before, the FDA was particularly cautious.
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