n.隆隆声；辘辘声
adj.隆隆响的
动词rumble的现在分词.
The distant rumbling of guns awoke us. 远处的炮声隆隆吠叫了我们。
The rumbling of the train slowly died away. 火车的隆隆声慢慢消逝了。
The earthquake began with a low rumbling sound. 地震开始时发出低沉的隆隆声。
adj.喃喃鸣不平的；出怨言的
n.皱纹；岩块剥落
adj.破碎的
动词crumble的现在分词形式.
