VERB(机器、昆虫翅膀等)发出呼呼声，嗡嗡作响 When something such as a machine or an insect's wing whirrs, it makes a series of low sounds so quickly that they seem like one continuous sound.
The camera whirred and clicked.
相机发出嗡嗡声和咔嚓声。
The silence was broken by the whirring of a helicopter.
whirrs