v.发出嗡嗡声,哼唱( hum的过去式和过去分词 );忙碌,活跃;
例句:
The market hummed as trade began.
交易一开始,市场就忙起来了.
She hummed her baby to sleep.
她低声哼着歌哄婴儿睡觉.
He started the car, which hummed smoothly.
他发动了汽车,车发出平稳的嗡嗡声。