The birds sang, the bees hummed.鸟儿唱歌,蜜蜂蜂鸣。
...the hum of traffic. …低沉的车流声。
My general reaction to this news might be summed up as "ho-hum."我对这条新闻的总体反应或许可用“哼儿哈儿”来概括。