Suddenly there was a loud bang and a puff of smoke.

突然一声巨响，喷出一股黑烟。

《牛津词典》

There was a loud bang and then all hell broke loose.

一声巨响之后顿时一片混乱。

《牛津词典》

Suddenly there was a loud bang.

突然发出砰的一声巨响。

《牛津词典》

They reported hearing a loud bang and seeing a flash as strong winds battered the aircraft.

BBC: Barra plane 'struck by lightning' during high winds

He said Mr Ege fell to his knees with a loud bang and started crying, calling out his son's name.

BBC: Yaseen Ali Ege death: Father Yousuf Ege 'unusually calm'

"My boys were upstairs at the time and heard a loud bang, " said the woman, who did not want to be named.

BBC: Officers at the TA base in west London