For example, Billboard's Modern Rock Chart lists the most popular songs on college radio stations. It's a way of tracking the tastes of "educated youth," those aged 18-30 who have or are working toward a bachelor's degree or higher.
例如美國 Billboard 雜誌的 Modern Rock Chart，便是統計在大學校園電台裡最受歡迎的歌曲，藉此區隔出 18 到 30 歲間、大學以上學歷的「知青」音樂品味。