mordent
US /ˈmɔːr.dənt/
UK /ˈmɔːr.dənt/

1.
回音, 顫音
a musical ornament indicating that the main note is to be played, followed by the note below (inverted mordent) or above (mordent) and then the main note again.
:
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The pianist added a delicate mordent to the melody.
鋼琴家為旋律增添了一個精緻的回音。
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Classical music often features various ornaments like the mordent.
古典音樂常有各種裝飾音,如回音。