These reactions increase the probability of incomplete combustion and are more likely to release uncombusted and photochemically active hydrocarbon compounds into the atmosphere.
这些反应增加了不完全燃烧的可能性，更有可能释放未燃尽和光化学活性碳氢化合物到大气中。
2
The furnace grate solves the problem that the uncombusted firewood can block the ash outlet.