This breaks open all bonds between the two strands of DNA, so that they can separate from one another.

这一步打破了两条DNA链之间的所有键，使它们彼此分离。

Certain reactions open up a double or triple bond to insert various atoms, leaving only a single bond between the carbons.

某些反应会打开一个双键或三键以插入各种原子，只在碳之间留下一个单键。

And those opened bonds can also provide connections for carbon atoms to attach to each other, too, opening the door for polymerization, which we should talk about soon enough.

那些打开的键也可以为碳原子提供相互连接的连接，也为聚合打开了大门，我们应该尽快讨论。