When the price of oil is low, exploration and production is expensive, but companies can rely on retail assets such as gas stations to benefit from the high profit margins at the pump.
油价低伏时，勘探和生产就变得昂贵，但这些公司却能依靠加油站这类零售资产获得高额利润。
The other raw material for photosynthesis, carbon dioxide, will be supplied as the exhaust from industrial plants such as power stations, oil refineries and natural-gas processors.
进行光合作用的其他原料——二氧化碳，将由发电站、炼油厂、天然气处理厂之类的工厂排出的废气提供。
They can also be used to power warships, merchant ships and oil tankers, or to generate electricity in small gas-fired power stations.
也能被用于军舰，货船及油轮上或者用于小型煤油燃烧发电站来发电。
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