restricted stem cell
限制性干细胞
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Mr Bush said finance would be restricted to existing stem cell lines from embryos that had already been destroyed.
BBC: Bush backs stem cell research
In the U.S. stem cell research has been restricted to private institutions since the Bush administration banned federally funded research in 2001.
CNN: Cloning success hailed, feared
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