a combustion is made of six-sided transparent preferences
internal_combustion is not combustion. combustion is chemical_process. lighting_match is combustion_in_action. byproduct_of_combustion is carbon_dioxide_and_water. internal_combustion is combustion. combustion is not tumult. combustion_reaction is not burning. combustion_reaction is burning. combustion is not chemical_process. combustion is tumult.