They do that because the bases can interact with one another in particular ways, and this you know about.

它们结构稳定,是因为碱基之间,以特定方式相互作用,这是你需要知道的

耶鲁公开课 - 生物医学工程探索课程节选

And, I've achieved octet stability in a new way.

这样，我就以一种新方式得到八电子稳定结构。

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That's because you have to satisfy this base pair matching in order to have hydrogen bonding in each of the struts of the ladder in order to form a stable structure.

NA双链要满足互补配对原则,以使碱基对之间,形成氢键,从而形成稳定的双链结构

耶鲁公开课 - 生物医学工程探索课程节选