On-line communicational silicon-controlled rectification power source with consumable electricity and low efficiency will increase operating cost.

在线通信用可控硅整流电源自身电耗高、效率低，使运行成本增加；

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Oxides on metal surface will deteriorate quality of deep processing. Using acid pickling to remove oxides is a conventional method, but will pollute environment and increase operating cost etc.

金属表面的氧化物会造成深加工质量问题，用酸洗去除氧化物的传统方式存在污染环境、成本高等诸多弊端。

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This proper use of this system could increase the management efficiency of the hotel, decrease operating cost.

该系统的合理运用能提高酒店客房管理效率，降低运营成本。

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Higher Operating Costs: The spokesman for Valero said that the new rules would increase the cost of operating a refinery.

FORBES: Buy The Dip In The Refiners

The GCS team is dedicated to improving the value of Hawker and Beechcraft aircraft by employing products and services to simplify ownership, reduce operating cost and increase resale value.

FORBES: Back In Business: Beechcraft Emerges From Chapter 11