Complex sentence: Under normal circumstances, this deflagration occurs too slowly to produce a significant pressure wave; low explosives, therefore, must generally be used in large quantities or confined in a container with a high burst pressure to be useful as a bomb.
Split into simpler sentences: Under normal circumstances deflagration occurs too slowly to produce a significant pressure wave. Low explosives must, therefore, be used in large quantities or confined in a container with a high burst pressure to be used as a bomb.