warbling

v.用颤音唱；鸟鸣

n.颤音；动物背上的肿块

A blackbird was warbling from the branch. 一只画眉鸟在枝头歌唱。

I heard the faint warble of Laura's voice. 我听到劳拉那柔和的颤音。

The strain was solemn and affecting, sustained as it was by the pathetic warble of a voice. 曲子既庄严又感人，是由悲怆的颤音唱出来的。