rumbling
['rʌm.bl.ɪŋ] /'-blɪŋ] noun
countable usually plural
■a sign of anger or disagreement 不满情绪；不满的迹象•There are rumblings of annoyance throughout the workforce.员工们普遍流露出怨愤情绪。 countable usually singular
■a continuous low sound 发出隆隆声；发出辘辘声；发出低沉连续的响声•the rumbling of distant guns/thunder远处隆隆的炮声／雷声 |