He comes from an upper-middle class family. Neighbors in this town of 5,000 are saddened by the news.

VOA: standard.2010.05.06

They did this because they didn't want the upper-class in Rome, who were the elite, they didn't want any one household, or any small group of households, to become too powerful.

因为他们不想罗马的上层阶级，即精英阶层，一户独大。

耶鲁公开课 - 新约课程节选

Upper-middle, I mean upper class, upper-middle class,

中上阶层，我是说中上阶层，

生活费偏高 - SpeakingMax英语口语达人

"When you compare the purchasing power the foreign purchasing power would be much higher than the middle-class or upper-class purchasing power in Thailand.

VOA: standard.2009.12.23

You may run into upper-class students, students who are more advanced, you will run into your TA.

你可能会碰上高年级的学生,他们比你的水平要高,当然还有助教

耶鲁公开课 - 基础物理课程节选