rumbling

1. N-COUNT A rumbling is a low, continuous noise. 咕噜声

...the rumbling of an empty stomach. …空腹发出的咕噜声。

2. N-COUNT Rumblings are signs that a bad situation is developing or that people are becoming annoyed or unhappy. 风声; 迹象

Even Baldwin had become aware that there were rumblings of discontent within the ranks. 就连鲍德温也开始意识到内部成员有不满的迹象。