n. 1.〔诗〕歌曲，曲调。 2.【音乐】童高音。 vi. 唱歌。 n. 详谈，评论。 vi. 详谈，评论 (on； upon)。 descant on the wonders of nature 畅谈大自然的奇迹。
a decorative musical accompaniment (often improvised) added above a basic melody 同义词：discant,
talk at great length about something of one''s interest
sing by changing register; sing by yodeling; "The Austrians were yodeling in the mountains" 同义词：yodel, warble,
sing in descant
Descant or discant can refer to several different things in music, depending on the period in question; etymologically, the word means a voice (cantus) above or removed from others.
例句与用法
1.
The girl students were asked to descant on the tune 女生们被要求唱高音部分。
2.
The boy singers were asked to descant on the tune 要求男孩子们唱高音部分。
3.
Richie , admiring , descanted on that man s glorious voice 里奇边赞赏边畅谈那个人的非凡的嗓子。
4.
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。
5.
A good market situation of polyurethane fiber in our country was introduced firstly , and then the reasons for the rising price of polyurethane fiber were descanted on , besides polyurethane fiber ' s properties , types and its applications were presented 摘要介绍了当前我国氨纶纤维良好的市场盛况，深入阐述了我国氨纶价格扶摇直上的主要原因。
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