To sing a wordless tune with closed lips

• To express a melody by humming

哼唱；闭口无词地唱

• 用哼声表达旋律

To make a low continuous sound, like a machine

• To buzz or drone like insects
• To be briskly active or lively, of a place

发出低沉而持续的声音，如机器

• 像昆虫般嗡鸣或嗡嗡作响
• 形容场所忙碌而有活力

A low, steady, continuous sound

• A tune produced by humming
• Lively activity with background noise

低而稳的持续嗡鸣

• 哼成的曲调
• 伴有背景嗡响的忙碌景象

Used to show thinking, hesitation, or doubt

表示思考、犹豫或怀疑的语气词

An instance of the interjection "um" in transcription

转写中一次“呃/嗯”等填充词的出现

A persistent, unexplained low-frequency humming heard by some people

持续的、原因不明的低频嗡鸣现象

To smell unpleasant; to reek

发出难闻气味；发臭

An unpleasant odor

难闻的气味；臭味