1. 動詞
   hum過去式與過去分詞:
   不及物動詞:
   發嗡嗡聲
   嗡嗡叫
   發哼哼聲
   閉口哼歌
   忙碌, 活躍
   順利運行
   興隆起來
   及物動詞:
   

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   同義字詞
   abound,brim,bristle,bulge,burst,bustle,buzz,crawl,overflow,swarm,teem
   bumble,burr,buzz,drone,whir,whirr,whish,whiz,whizz,zip,zoom
   

例句

1. She hummed a song in her head.
2. The work hummed on for a while.
3. He hummed under his breath for a minute.
4. An embarrassed silence hummed on the air.
5. He sipped it hot, hummed his appreciation.
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