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.
在复制叉处与单链dna结合的蛋白质，它们保护单链防止它们互相重新结合。
Proteins that bind to single-strands of DNA at a replication fork, protecting the strands and preventing them from rebinding to each other.
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