The engines of the compressor run on the wellhead natural gas, thereby part of the fuel expense can be saved and much financial profit can be gained.

机组中的天然气发动机完全以井口天然气为燃料运行，可节省大量燃料费用，具有较高的经济效益。

youdao

Fuel is his single biggest expense: buying it takes up much of his time.

燃料的开销是最大的：购买也需要大量时间。

youdao

P. S. : the tickets reservation points can be only used for the expense of the ticket itself, but not include the fees for security, aerodrome construction, and fuel.

注：机票预定积分仅限于累计机票费用，保险费、机场建设费、燃油费不予以累计。

youdao

If that price is too low,he says, it will not adequately cover the expense of fuel,fertilizer, herbicides and equipment.

VOA: standard.2010.07.29

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