grumbling

The grumbling of the old engine could be heard from down the street.

街道尽头就能听到旧发动机的隆隆声。

We woke up to the low grumbling of distant thunder.

我们醒来时听到远处雷声低沉的隆隆声。

There was a constant grumbling from the machinery in the basement.

地下室里的机器发出持续的隆隆声。