Then, the two basic theorems are introduced-benefit cost Theory and cost Utility Theory, where the concept of total passenger travel cost and the concept of vehicle operation cost are come up with.

其次，介绍了效益费用原理和成本效用原理，这是本次研究所运用到的基本原理。其中，在成本效用原理中提出了乘客总出行成本和车辆运营成本这两个成本概念。

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Four different chemical reactions dominate the industry-each of which has pros and cons when it comes to utility, durability, cost, safety and performance.

四种不同的化学反应主导了工业界——当考虑到效用、耐用性、成本、安全性和性能时，它们中的每一种都有优劣之分。

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The EXPLAIN utility reports the anticipated computing resource cost of executing the query.

EXPLAIN实用程序会报告执行查询的预期计算资源成本。

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But what a university sees as a no-brainer cost reduction, a utility often sees as a threat to sales.

FORBES: The Most Efficient Power Plants

They frequently depend on venture-capital funds which are dwarfed by the cost of even a single utility-scale power plant.

ECONOMIST: The prospects

American Electric Power (AEP) chose to delay its plans to build a wind farm in Indiana when the heavily indebted utility found its cost of capital had soared because of turmoil in the corporate-bond market.

ECONOMIST: Corporate social responsibility