当身体有一个遗传问题，比如伤疤组织或者一个基因疾病时，DNA必须首先改变。
When there is a genetic problem such as scar tissue or a genetic ailment, the DNA must be altered first.
这项研究的负责人弗兰克·布拉德克将伤疤组织比作路口的停车标志，它阻止了神经纤维的再生。
Lead investigator Frank Bradke likens scar tissue formation to "stop signs" that impede the regrowth of nerve fibers.
久而久之，这些病人会得心力衰竭病因为在心脏病突发中损坏的心脏肌肉组织最终会被僵硬的伤疤组织所替代。
Over time, those patients will develop heart failure because injured heart muscle tissue damaged by the heart attack will eventually be replaced by stiff scar tissue.
应用推荐