Fossils are often washed together on-site in a large bath which can allow water and contaminants in the form of contemporary DNA to permeate into the porous bones.
化石通常在大浴池中进行现场清洗，这可以使水和现代 DNA 形式的污染物渗透到多孔骨骼中。
2
Once synthesized, the histones move into the cell nucleus, where a section of DNA wraps around them to forma structure that resembles beads, or knots, on a string.
一旦合成，组蛋白就会进入细胞核，细胞核内的 DNA 片段会将组蛋白包裹起来，形成一种类似串珠或绳结的结构。
3
Phosphorus chains form the backbone of DNA and its chemical bonds, particularly in a molecule known as adenosine triphosphate, the principal means by which biological creatures store energy.