Emphasis on pollution abatement may cause recovery systems to be installed, especially if production cost can be brought near the break-even point. 消除污染的强烈要求可能促使建立各种回收系统，要是生产费用接近不赚不负的话更是如此。
Turning off unneeded systems and reducing the amount of contact with the craft lowers the chance of equipment failures and drastically decreases mission operations costs. 关掉不必要的系统与减低联络的次数，可以降低设备故障的机会，也会大幅降低任务运转成本。
Energy consumption continues to be the largest operating expense category in petroleum product manufacturing. 在石油产品的生产中，能耗继续占操作费用中最大的一类。
Net income Revenues less operating costs. 净收入收入减去经营成本。
When the price of oil hit the sky last year, Mr Wright's operating costs nearly trebled. 当去年石油价格涨到天高的时候，莱特先生的经营成本也翻了三倍。
