n. a humming noise
v. sing with closed lips
v. be noisy with activity
v. sound with a monotonous hum
n. 嗡嗡声, 哼声, 杂声
vi. 发低哼声
vt. 哼, 用哼声表示
interj. 哼, 嗯
1. I like to hum my favorite song while I work.
我喜欢在工作时哼唱我最喜欢的歌曲。
2. She started to hum a tune that reminded her of summer.
她开始哼起一首让她想起夏天的旋律。
3. The baby began to hum softly as he fell asleep.
宝宝在入睡时开始轻轻哼唱。