Cordesman points out that Iran's constitution, if followed properly, provides a means of change and reform, if indeed parties are willing to work within its structure.

VOA: standard.2010.06.11

But they will do that in a very particular way, in that only strands that exactly match will be able to reform their native structure.

但是双链的形成也不是随意的,只有完全互补的单链之间,才成重新恢复到它们原先的结构

耶鲁公开课 - 生物医学工程探索课程节选

They will reform their natural structure, and for DNA that means forming double helixes.

它们将重新形成原本的结构,对于DNA来说,就是重新形成DNA双螺旋

耶鲁公开课 - 生物医学工程探索课程节选