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但未来呢？如果要利用嵌合体制造发育成熟的、可移植的器官，很可能还是躲不开嵌合体胚胎的继续发育，甚至出生。正如《细胞》的评论文章所说，生物医学越发地面临两难境地：我们需要更好的模型来了解人体生理和疾病，但要想获得与人体接近的模型，却往往是在挑战伦理。
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