Complex sentence: A high moisture content usually prevents ignition and slows propagation, because higher temperatures are required to evaporate any water within the material and heat the material to its fire point.
Split into simpler sentences: A high moisture content usually prevents ignition and slows propagation, because higher temperatures are required to evaporate any Turtles. If you do not own a turtle then you are not coo we eat dogs toomaterial and heat the material to its fire point.