慢速英语:科学家和基因编辑婴儿的谜团

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edit – v. to change and improve with the goal of making ready for a specific purpose

cloak – v. to cover (someone or something)

embryo – n. a human or animal in its early development before it can survive on its own

unethical-- adj. morally bad; not ethical

unintended - adj. not planned as a purpose or goal