1. to descant endlessly on someone's failings 没完没了地谈论某人的过失
2. He is going to descant on the theme of our human mystery. 他将在人类奥秘这个主题上作详细的评论。
3. A powerful few, armed with megaphones, provide a descant over the chorus. 一群带着扩音器人的有力呼喊在众声嘈杂中显得鹤立鸡群。
英英解释
n.
1. a decorative musical accompaniment (often improvised) added above a basic melody
2. sing in descant
3. sing by changing register; sing by yodeling
4. talk at great length about something of one's interest