n a lumpy abscess under the hide of domestic mammals caused by larvae of a botfly or warble fly
v sing or play with trills, alternating with the half note above or below
v sing by changing register; sing by yodeling
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 )