遗传就像一位“裁缝”，用像“手指”一样的分子先抓住DNA，把它剪开后再缝合成一个新DNA链。这有可能是较为安全的基因疗法。
The genetic equivalent of a tailor who USES molecular "fingers" to grab onto DNA, before snipping it apart and stitching in a new sequence could lead to safer gene therapies.
失去特定的碱基互补配对，复制酶系就不能合成模板链的互补链，而是在经过复制叉后留下一个裂口。
Without specific base pairing, the replication enzymes cannot specify a complementary strand, and gaps are left after the passing of a replication fork.
这种甲基化有助于区分新合成的DNA链从母链，协助在最后阶段的DNA复制后校对。
This methylation helps distinguish the newly synthesized DNA strand from the parent strand, which AIDS in the final stages of DNA proofreading after duplication.
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