“啁啾”的英语可以翻译为：chatter，chirp ...

鸟儿继续啁啾。The bird continued to warble.到处是小鸟的啁啾.The whole air was filled with the carols of birds.鸟儿开始在树丛中啁啾鸣啭.Birds had begun to chirp and twitter among the trees....