The major difference between these two power generators is that the chemicalenergy of the fuel cell is converted directly to electrical power without intermediate conversion first to heat.
主要的区别在于，燃料电池的化学能量能直接转化成电能而不需要先转化成热能。
2
When a fuel unites with oxygen, we say the fuel burns; what is really happening is that chemicalenergy (fuel and oxygen) is changing to heat energy.
当燃料与氧气结合，我们就说燃料开始燃烧了，实际发生的是化学能(燃料与氧气)转化成热能。
3
Chemicalenergy gasoline, fossil fuel can be burned, converted to heat, converted to electricity.