...the three-dimensional structure of DNA.是什么意思？

...the three-dimensional structure of DNA.

DNA 的三维结构

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

structure

n. 结构，构造，建筑物，体系；vt. 构成，排列，安排；

例句
Engineers found the structure had been corroded by moisture...
工程师们发现该建筑已经受潮腐蚀。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

DNA

abbr. did not attend 没有参加，does not answer 不回答；

例句
Genetic abnormalities are more often associated with faults in paternal DNA than in maternal DNA.
相对于母本DNA,基因畸变往往更多地与父本DNA上的缺陷相关。