We are cruising along at 30 mph when, suddenly, the car flies up in the air and lands with a dull thump.

我们正以每小时30英里的速度行驶，突然，汽车腾空而起，砰的一声重重地落在地上。

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He leaped on to the platform with a thump.

他腾地一声跳到台上。

《新英汉大辞典》

The plank fell on the ground with a thump.

砰的一声，木板倒下来了。

《新英汉大辞典》

Then, with a thump of such suddenness that for a moment it might have been taken for a warning of emergency or disaster, music again burst from the Star night club.

NEWYORKER: Bravado

The T-shirt gun had a new CO2 canister that blasted away with a healthy thump.

WSJ: Brooklyn Hype at Its Best

Then again, disgruntled Republicans in the House could send it crashing to the ground, with a sickening thump.

BBC: Taking it to the wire, and beyond