The low rumble all at once broke into a loud Peal of thunder.

低沉的隆隆声突然变成大声的雷呜。

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The air smelled like wood smoke and we could hear the low rumble of vaporetti cruising the Grand Canal.

空气中飘着柴火烟的味道，听得见大运河上的水上巴士发出低沉的辘辘声。

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The dog gnawed the bone, turned it over, licked it, and sometimes made a low rumble or growl, similar to a cat's purring.

牠啃着骨头，翻来覆去地舐它，有时还会发出低沉、咕噜咕噜的咆哮声，好像猫儿发出的叫声。

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There's a low rumble at idle, and above 4, 000 rpm this slowly rises in urgency.

FORBES: Test Drives

It began as a low rumble, I thought it was a train or large machine on the road at first, but when the whole house began to shake I realised it could only be an earthquake or perhaps a large plane crash.

BBC: Cumbria quake: Your comments

The applause started as a low rumble and then it became something wilder and appreciative, and then there he was, Ogden himself, all 6 feet 9 of him, unmistakable, wide as a big screen, walking on the floor, dressed in a sharp black shirt.

WSJ: Super Bowl: The Night (Half) the Lights Went Out