the upper crust
noun [ S, + sing/pl verb ] informal uk/ˌʌp.ə ˈkrʌst/ us/ˌʌp.ɚ ˈkrʌst/
上层社会的成员
people who have the highest social position and are usually rich
Many treasures were brought back to Britain because its upper crust was wealthy and liked travelling abroad. 大量财宝被带回英国，因为那里的上层社会成员很富有并且喜欢在外国游历。