v.  哼（曲子）

v.  发出嗡嗡声

n. 〔场所〕忙碌，活跃〔含褒义〕

n.  嗡嗡声；低沉而持续的嘈杂声

• hum and haw  支吾，吞吞吐吐；迟疑 ≈ hem and haw

• hum of excitement/approval  兴奋/赞同等的嗡嗡声

• Tony was humming to himself as he drove along. 托尼边开车边哼着曲子。

• Machines hummed on the factory floor. 机器在车间里嗡嗡作响。

• By nine o’clock, the restaurant was humming. 到9点钟时，餐馆里开始忙碌起来。

• The streets were humming with life. 大街上熙熙攘攘。

BrE /əˌbriːviˈeɪʃn/