The development of the oil field on the North Slope of Alaska and the construction of the Alaska pipeline are examples of the great expense and difficulty involved in new oil discoveries.

阿拉斯加北坡油田的开发，以及阿拉斯加地区输油管道的建设，就是在新石油资源的勘探中涉及到巨额开支和巨大困难的例子。

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The expense for the field acquisition of seismic data, i. e. the direct cost in the budget of the seismic engineering, accounts for about 80% of the whole engineering cost of seismic exploration.

在四川盆地的地震勘探工程中，地震资料野外采集施工费用，即地震工程预算中的直接工程费，占整个地震勘探工程成本的80%左右。

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And the selection of the operation parameters for the field acquisition of seismic data influences the expense greatly.

而地震资料野外采集施工参数的选择又很大程度地影响着施工费用。

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At the same time, over the past six and a half years, the special interests have had a field day at the expense of the middle class and hard-working families.

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Lockheed has recently won several major cyberwarfare awards at the expense of competitors, and seems to be a preferred destination for many specialists in the field.

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Although the ice-minus bacteria proved safe and effective at preventing frost damage in field trials, further research and commercialization were discouraged by the combination of onerous government regulation, the inflated expense of doing the experiments and the prospect of huge downstream costs of pesticide registration.

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