polynuclear compound

例句：

1. 1.The molecule is made up of several polynuclear rings.
   这个分子由几个多核环组成。
2. 2.Polynuclear compounds are often used in cancer treatments.
   多核化合物常用于癌症治疗。
3. 3. The study found that polynuclear compounds were effective against the virus.
   研究发现，多核化合物对这种病毒有效。