正文
A team of U.S. and South Korean scientists have successfully “edited” human DNA, opening the door to future life-saving medical treatments as well as ethical questions.
一个美国科学团队和韩国的科学家们成功地“编辑”了人类DNA，打开了未来拯救生命医学治疗和伦理问题的大门。
According to the BBC, the scientists “successfully freed embryos of a piece of faulty DNA that causes deadly heart disease to run in families,” a process that “opens the door to preventing 10,000 disorders that are passed down the generations.”
据英国广播公司（BBC）报道，科学家们“成功修正了一份有缺陷DNA的胚胎，这种缺陷DNA可导致致命心脏疾病在家族中流行”，这一成功“为阻止代代相传的上万种疾病打开了一扇门。”
The BBC continues:
英国广播公司继续报道说：
US teams at Oregon Health and Science University and the Salk Institute along with the Institute for Basic Science in South Korea focused on hypertrophic cardiomyopathy.
美国俄勒冈健康科学大学和索尔克研究所的美国团队以及韩国基础科学研究所致力于肥厚性心肌病的研究。
The disorder is common, affecting one in every 500 people, and can lead to the heart suddenly stopping beating.
这种疾病很常见，每500人中就有一个人受其影响，并可能导致心脏突然停止跳动。
It is caused by an error in a single gene (an instruction in the DNA), and anyone carrying it has a 50-50 chance of passing it on to their children.
它是由单个基因(DNA中的一条指令)中的某个错误引起的，任何携带这种基因的人都有50%的机会将其传给自己的孩子。
In the study, described in the journal Nature, the genetic repair happened during conception.
在《自然》杂志上描述的这项研究中，基因修复是在怀孕期间进行的。
