Cách sử dụng
The word 'warble' means to sing or whistle with a fluctuating sound or to produce a series of musical notes. You can use it to describe the sound of a bird singing, or when a person sings a melody with a quivering voice. It is also used in certain types of music, such as country or folk. Additionally, you may hear it used to describe a mechanical or electronic sound that fluctuates.