動詞 quaver:

1. give off unsteady sounds, alternating in amplitude or frequency
   同義詞：quaver, waver
2. sing or play with trills, alternating with the half note above or below
   同義詞：warble, trill, quaver

形容詞 quavering:

1. (of the voice) quivering as from weakness or fear
   同義詞：tremulous

1. You could hear the quaver in her voice.
   她的聲音中能聽出有些顫抖。
2. The children quavered out their little song.
   孩子們顫悠悠地唱出了一支歌。
3. Quavers, crotchets and minims are three of the different lengths of note in written music.
   八分音符、四分音符和二分音符在樂譜上是不同長度的三個音符。