grumble

抱怨、发牢骚、嘀咕

He grumbled about the long hours and the low pay.

他抱怨工时太长、薪水太低。

发出低沉声响、隆隆作响

Thunder grumbled in the distance all afternoon.

整个下午远方的雷声隆隆作响。

咕噜叫指肚子

My stomach started grumbling halfway through the meeting.

会议开到一半，我的肚子就咕噜叫了起来。

怨言、牢骚

There were a few grumbles about the new parking rules.

对于新的停车规定，出现了一些怨言。

低沉声响、隆隆声

We heard a low grumble of thunder before the rain came.

下雨前我们听到一阵低沉的雷声。