hummed
v.
发出嗡嗡声，哼唱( hum的过去式和过去分词 );
忙碌，活跃;
例句:
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He tapped his feet, hummed tunes and jiggled about.
他脚下打着拍子，嘴里哼着调子，身子晃来晃去的。
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These flowers...hummed all day with ambushes of bees and wasps.
来自Day Lewis
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He started the car, which hummed smoothly.
他发动了汽车，车发出平稳的嗡嗡声。
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The birds sang, the bees hummed.
鸟儿叫，蜂儿鸣。
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She...hummed...and did not make a single false note.
来自W. Irving
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Until the pianist arrived, he hummed accompaniment.
来自NEWYORKER