脱氧核糖核酸也拥有这种组合系统，你的生物基础或氨基酸数量是有限的，但却能组合出，几乎无限的脱氧核糖核酸螺旋结构。
DNA also has this sort of combinatorial system where you have a finite number of, I guess, bases or amino acids that could combine to a possible infinity of strings of DNA strings.
DNA（脱氧核糖核酸）的分子是一种双螺旋结构，酷似一架沿纵向扭曲的梯子。
The DNA molecule is a double helix, resembling a ladder that's been twisted along its length.
了解脱氧核糖核酸的分子结构开辟了一个研究的新领域。
Understanding the D-N-A molecule has opened up new areas of research.
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