warbles

n.

鸟啭，颤声( warble的名词复数 )；

v.

鸟鸣，用柔和的颤声唱( warble的第三人称单数 )；

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

1. I heard the faint warble of Laura's voice.
   我听到劳拉那柔和的颤音。
2. 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。

Warbles.
Incidence of Warbles in Some Oklahoma Rodents
Are warbles and bots related to reproductive status in West Greenland caribou?
Responses of naive Yellow Warbles to a novel nest predator
[The temperature in warbles of Hypoderma bovis and Crivellia silenus]
Efficacy of ivermectin against cattle warbles in Pakistan
INFLUENCES OF SEX HORMONES ON THE LOUD AND SOFT WARBLES OF MALE BUDGERIGARS.
Efficacy of ivermectin against goat warbles (Przhevalskiana silenus Brauer) in Pakistan.
Scanning electron microscopic study of third-instar warbles in yak in China
Factors influencing post-fire dynamics of Sardinian and Dartford Warbles in Mediterranean shrublands