But you may be wondering whether the process of setting off fireworks is considered combustion? Because it is more like an explosion than burning!

You’re right, it's about the other part of the combustion-----Reaction Speed. Spontaneous, rapid, and explosive combustion are three combustion reactions that mainly show the reaction speed.[DYYWD1] 

The spontaneous combustion reaction generally occurs at room temperature and takes a long time. For example, coal can react with oxygen to release heat. When ventilation is insufficient, the temperature of coal cannot be lowered, and eventually happen spontaneous combustion.

Rapid combustion is the reaction in which a large amount of heat and light are produced in a short time, for example the immediate burning of cooking gas in a gas stove to give heat and light.

Explosive combustion is a very fast reaction in which a large amount of heat, light, and [DYYWD2] sound are produced, such as the explosion from the spark plug in cylinder engine by air-fuel mixture and the main item of today---fireworks！

 [DYYWD1]Do you need to describe the different reaction speeds here, or just say fireworks works because of high reaction speed?
 [DYYWD2]How about pressure?

暂时只支持：女声、普通男声、高音质男声、情感男声，四种声音。