make a continuous low sound
be full of life or active
humming sound, esp. of an insect; indistinct murmur, esp. of many voices
"they manifested all the busyness of a pack of beavers"
"there is a constant hum of military preparation"
"the hum of distant traffic"
"She hummed a melody"
"This office is buzzing with activity"
"The refrigerator is humming"
I have found..the persistent hum of the traffic..remarkably soothing.
出自： N. Bawden
Her real conversion..happened in semi-darkness, to the accompaniment of a low hum given off by the museum's slide projector.
出自： R. Ingalls
All of a sudden..a 'hum' goes round about some politician or other.
They hummed and hawed and I could tell they weren't too interested.
出自： J. Kelman
The bees were humming around the hive.
He hummed the tune to me.