A noisy but harmless pyrotechnic device used especially in military exercises.
（尤指军事训练中引发爆炸声但无害的）烟火装置
Example sentencesExamples
We managed to scare the bear away using 30 mm rubber bullets and thunderflashes - a kind of pyrotechnic or firework.
Or all three so we had to back it up with firing off a thunderflash from a hand pistol.
Opinion Leader Research is only one pollster reporting a thunderflash of anger in focus groups that is oddly not reflected in the polls.
The squaddies who raided his ammunition store for those thunderflashes 60 years ago never confessed, so it was Norman who had to go before his colonel on a charge.
By 1 pm at the latest, the MPs were dead and though a British army Chinook, dropping thunderflashes and possibly firing, had arrived, it was too late.
They turned up with machine guns loaded with blanks, flares and thunderflashes.
Rockets lit up the sky as thunderflashes, flying earth, acrid smoke and the chatter of machine-gun fire filled the air night after night.
Unfortunately, Ann's son Caspar flung an Army thunderflash into the confined space, injuring my eardrums.