hum/hʌm/ (hummed, hummed; humming)

vi

1. 哼曲子

• She hummed as she walked. 她边走边唱。

2. (蜜蜂等)发嗡嗡声

3. (事业等)活跃

• The factory has started to hum with activity. 那工厂已经开始蓬勃起来。

4. (犹豫、不满等时)发哼哼声

vt 哼(曲子)

• He was humming a tune to himself. 他独自哼着小调。

词组hum and haw [表示踌蹰、疑惑等] 支支吾吾，吞吞吐吐