whirr
(also esp US whir), / wɜ:(r); ?@ hw-; hwə/ n (usu sing 通常作单数) continuous rapid buzzing or vibrating sound 连续而迅速的嗡嗡声或震动声
the whirr of a fan, motor, propeller 风扇、 发动机、 螺旋桨的呼呼声. whirr (also esp US whir) v [I]
make this sound 发出嗡嗡声或震动声
The bird flew past, its wings whirring. 那只鸟飞了过去, 翅膀发出呼呼的声音.