How can a utilitarian distinguish qualitatively higher pleasures from lesser ones, base ones, unworthy ones? Yes?

功利主义者何以将性质上更高级的快乐,与较低级，基本无价值的区分开呢，请说？

耶鲁公开课 - 公正课程节选

Third floor is where I live. That's substance-free, no alcohol and no drinking.

我住在三层。那是无饮酒区，没有酒精，不许喝酒。

布朗的宿舍公寓 - SpeakingMax英语口语达人

There's 60 people in the dorm, and I'm in the substance-free zone.

宿舍有60个人，我在无饮酒区。

布朗的宿舍公寓 - SpeakingMax英语口语达人