rumbling

n.

隆隆声；辘辘声；

v.

隆隆响( rumble的现在分词)；低沉地说；（车辆）辘辘行驶；

复数：rumblings

1. The distant rumbling of guns awoke us.
   远处的炮声隆隆吠叫了我们。
2. The rumbling of the train slowly died away.
   火车的隆隆声慢慢消逝了。

1. The rumbling thunder grew louder, and louder.
   隆隆的雷声越来越大。
2. The earthquake began with a low rumbling sound.
   地震开始时发出低沉的隆隆声。

1. I'm hungry -- my stomach's rumbling.
   我饿了,饥肠辘辘。

[Rumbling of a butterfly wing]
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Objective evaluation of the rumbling sound in passenger cars based on an artificial neural network