1. These molecules burn more cleanly than gasoline, in part because they have fewer, if and, carbon-carbon bonds, and the hydrocarbons they do emit are less likely to generate ozone. 这些分子燃烧起来比汽油更清洁，部分原因是它们的碳-碳键更少或者不存在，而且它们排放的碳氢化合物产生臭氧的可能性更小。
2. These molecules burn more cleanly than gasoline, in part because they have fewer, if any, carbon-carbon bonds, and the hydrocarbons they do emit are less likely to generate ozone. 这些分子燃烧起来比汽油更干净，部分原因是它们的碳-碳键更少（如果有的话），而且它们排放的碳氢化合物不太可能产生臭氧。
3. Electrolysis of water, catalytic decomposition of hydrocarbons? 电解水，催化分解碳氢化合物？
4. Russia has some of the world's great untapped reserves of hydrocarbons. 俄罗斯坐拥了世界上最大的并尚未开采的烃类资源储备。
5. Burning hydrocarbons (natural gas and petrol) yields both water and CO2. 燃烧碳氢化合物(天然气和汽油)会产生水和CO2。
