For example, when President George W. Bush announced in 2001 that the United States would not fund research into new stem-cell lines that are created from human embryos, he offered the following reason: “Like a snowflake, each of these embryos is unique, with the unique genetic potential of an individual human being.”
例如，布什总统在2001年宣布美国将不会资助从人类胚胎制成的新的干细胞株时，他提出如下理由：“这些胚胎像雪花一样，每个都是独一无二的。它们都具有单一个人的独特的基因潜力”。