To be sounded in a trilling or quavering manner .

以颤抖的声音说或唱。

The quavering voice grew louder .

颤声越来越响。

Whenever there was a pause in the song she filled it with gasping , broken sobs , and then took up the lyric again in a quavering soprano .

每逢曲中有停顿的地方，她就用抽抽噎噎的哭声来填补，然后又用震颤的女高音继续去唱歌词。

She asked in a quavering voice .

她用颤抖的声音问道。

In an unsteady quavering manner .

以不稳定的、颤抖的方式。