RNA molecules form double stranded helices, just as do DNA molecules, by Watson Crick pairing of nucleotides on the two complementary strands of the helix.

RNA分子能像DNA分子那样形成双链螺旋，通过沃森·克里克配对，两个螺旋的核苷链互补。

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Being as an important hereditary substance, DNA has the double helix, the two bonds composing the double helix are mating and connecting with each other through the purine and the pyrimidine.

作为重要的遗传物质，DNA为双螺旋结构，组成双螺旋的两条链由嘌呤和嘧啶通过氢键配对联系。

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Antisense drugs are named after one of DNA's two strands in its double-helix structure, which are known as sense and antisense.

FORBES: Antisense and Sensibility

It was as though their privation was somehow genetic, transferred biologically in some sad double helix of DNA from one Zulu generation to the next.

NPR: One Boy's Heroism in the Face of AIDS