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
示例:• 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。同义词:grumblemuttercomplainmurmurrumble