[shǔ yú]

fall into the same category
屬于同一范疇

To this class of substance belong mica, porcelain, quartz, glass, wood, etc.
屬于這類物質的有云母、瓷器、石英、玻璃、木材等等。

Democracy is part of the superstructure.
民主屬于上層建筑。