事实上，路易斯安那州为那些在汽车上安装了可以使用压缩天然气为燃料的人们提供了税收优惠政策。
Indeed, Louisiana is offering tax incentives for people to install fuelling equipment that will allow vehicles to run on compressed natural gas.
有些卡车已经使用清洁柴油引擎。其它一些卡车也有使用压缩或液化天然气燃料的。
Some trucks now run on cleaner burning diesel fuel engines, while others are using compressed or liquefied natural gas.
在合成天然气的的情况下，这种合成天然气也能被压缩和使用在由内燃机发动的汽车上。
In SNG's case, the gas can also be compressed and used to fuel cars with internal-combustion engines.
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