1. 飞机螺旋桨转动 呼呼：12、踩沙子、飞沙击物或风吹草木 沙沙、飒飒 rustle | 13、飞机螺旋桨转动 呼呼 whirr | 14、雨点敲击房顶 噼里啪啦 patter

2. whirr

2. 呼呼声：whirlybird 直升飞机 | whirr 呼呼声 | whish 呼呼声

3. 飕地飞：whirr 马达嗡嗡转动 | whirr 飕地飞 | whirwhish 呼呼声

4. 马达嗡嗡转动：whirly 回旋的 | whirr 马达嗡嗡转动 | whirr 飕地飞

1. (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.

    e.g. The camera whirred and clicked.
           相机发出嗡嗡声和咔嚓声。
    e.g. ...the whirring sound of the film projector.
           电影放映机的嗡嗡声

1. sound of something in rapid motion

    e.g. whir of a bird''s wings
           the whir of the propellers

    Synonym: whirwhirringbirr

1. make a vibrant sound, as of some birds

    Synonym: churr

2. make a soft swishing sound

    e.g. the motor whirred
           the car engine purred

    Synonym: whizzwhizwhirbirrpurr