"We were able to match up the narrow and wide rings exactly so that we can assign the exact calendar dates to the exact rings of every tree."

VOA: standard.2010.04.05

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