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至于绕不开的伦理问题，他们都在期待新的伦理规范。根据《自然》杂志的消息，国际干细胞研究学会年会可能将于下个月公布修订后的干细胞研究指南，对人-灵长类动物嵌合体做出规范。
是时候用伦理给科学划定一条更明晰的线了。
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