If someone grumbles, they complain about something in a bad-tempered way.
例句
I shouldn't grumble about Mum — she's lovely really...我不该抱怨妈妈——她真的很好。Taft grumbled that the law so favored the criminal that trials seemed like a game of chance...塔夫脱抱怨法律如此偏袒罪犯,审判看来像是一场碰运气的游戏。
VERB
隆隆作响
If something grumbles, it makes a low continuous sound.
例句
It was quiet now, the thunder had grumbled away to the west...隆隆的雷声向西边传去,现在寂静下来了。The dogs made a noise, a rough, grumbling sound.这些狗发出刺耳的低吼声。
英英词典释义
Noun
1. a loud low dull continuous noise;
"they heard the rumbling of thunder"
2. a complaint uttered in a low and indistinct tone
Adjective
1. continuous full and low-pitched throbbing sound;
"the rumbling rolling sound of thunder"
2. muttering discontentedly;
"the grumbling boarders requested a meeting with the cook"