N-COUNT-COLL [with singular or plural verb]上层阶级;上等阶层;上流社会 The upper class or the upper classes are the group of people in a society who own the most property and have the highest social status, and who may not need to work for money. 上层阶级;上等阶层;上流社会
...goods specifically designed to appeal to the tastes of the upper class.
专门为迎合上流社会品位而设计的商品
Many of the British upper classes are no longer very rich.