to sing with the alternation of two musical tonesa bluebird trilled outside our window
a bluebird trilled outside our window
quavers, warbles
slursyodelsbelts, carols, chants, choruses, croons, descants, harmonizes, trolls, vocalizeslilts, scats
英语同义词词典收录了63618条英语词条,基本涵盖了全部常用同义词或反义词的辨析及翻译,是英语学习的有利工具。