benzenoid system) and coronoid systems are the natural representations of the skeletons of molecules of benzenoid hydrocarbons and coronoid hydrocarbons in the field of organic chemistry.

• 六角系统(苯环系统)和冠状系统分别是有机化学领域中的苯碳氢化合物和冠状碳氢化合物的分子结构的自然体现。