抱怨, 低声抱怨
to make a low, rumbling sound, often indicating displeasure or a warning, similar to an animal's growl but made by a person
:
• He let out a low growl of frustration.
他发出一声低沉的咆哮,表示沮丧。
• The old man would often growl about the noisy children.
老人经常对吵闹的孩子们抱怨。