轉筒混合; 雷鳴樣的
Rumbling \Rum"bling\, a. & n. from {Rumble}, v. i.
rumbling adj : continuous full and low-pitched throbbing sound; "the rumbling rolling sound of thunder" [syn: {grumbling}] n : a loud low dull continuous noise; "they heard the rumbling of thunder" [syn: {rumble}, {grumble}, {grumbling}]