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v.发出嗡嗡声，哼唱( hum的现在分词 )，忙碌，活跃...
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This is a humming - bird moth.这是蜂鸟科的天蛾.There was a low humming sound in the sky.空中传来一阵低沉的嗡嗡声。The guard stopped his humming and turned his head sharply.守卫停止了哼唱，猛地转过头。The bees were humming around the hive.蜜蜂在蜂箱周围嗡嗡地叫.Hummi...
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The guard stopped his humming and turned his head sharply.守卫停止了哼唱，猛地转过头。There was a low humming sound in the sky.空中传来一阵低沉的嗡嗡声。Within five hours, the equipment will be humming away again.用不了5小时，设备就又能嗡嗡地运转了。...