乙醇作为一种生物燃料相对来说容易生产。但是与汽油相比它的能量密度较低，而且不能够通过现有的化石燃料管线来运输。
As a biofuel, ethanol is relatively easy to make, but it has a lower energy density than gasoline and can't be transported through existing pipelines designed for petroleum fuels.
地上已经有了许多原先从输油管线中泄漏出来的飞机燃料，都是SCADA系统没能探测到的泄漏所引起的。
The ground already contains quite a bit of jet fuel leaked from older hydrant pipe systems that was not detected by the existing SCADA instrumentation.
地上已经有了许多原先从输油管线中泄漏出来的飞机燃料，都是SCADA系统没能探测到的泄漏所引起的。
The ground already contains quite a bit of jet fuel leaked from older hydrant pipe systems that was not detected by the existing SCADA instrumentation.
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