(亦作 whir)
(whirred, whirring)no obj.
- (especially of a machine or a bird's wings) make a low, continuous, regular sound（尤指机器, 鸟翅）发出呼呼（或嗡嗡）声; 呼呼（或嗡嗡）地响：
the ceiling fans whirred in the smoky air.
吊扇在烟雾弥漫的空气中呼呼地转。
- a sound of such a type呼呼声; 嗡嗡声：
the whirr of the projector.
放映机发出的嗡嗡声。
词源
late Middle English （in the sense 'move with a whirr-ing sound'）： probably of Scandinavian origin; compare with WHIRL.