Finally, a ligase enzyme which would be the glue binds the two ends of DNA.

最后，一种连将DNA端连。

Finally, DNA polymerase fills the gaps on both sides of the union and DNA ligase seals the bond.

最后，DNA聚填补侧连处的空白；DNA连将化学键连。

Then, DNA polymerase and ligase again fill in and repair the cut strand.

然后， DNA 聚和连再次填充并修复被切断的链。

He then mapped out how two other enzymes are involved: DNA polymerase, which fills in the gap, and DNA ligase, which stitches the pieces back together.

然后，他绘制了另外种的参与方式：填补空白的 DNA 聚和将片段缝在一的 DNA 连。