Reduced cost: Cloud computing can reduce both capital expense (CapEx) and operating expense (OpEx) costs because resources are only acquired when needed and are only paid for when used.
降低成本：云计算可以降低资本费用(CapEx)和运营费用(OpEx)，因为可以只在需要时购买资源，而且只按使用时间付费。
This process is highly effective with low operating expense; it might be useful to treat similar wastewater with high organic concentration and fluctuant inflow.
该工艺具有处理效果好、运行费用低的特点，特别对水质水量波动大的香料废水及其它类似的高浓度有机废水治理有较好的借鉴作用。
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。
We need to know that energy consumption represents the single largest controllable operating expense for a building, typically a third of variable expenses.
我们应当认识到，能源消耗是建筑物的唯一一项最大的但可控制的营运费用，一般为可变费用的三分之一。
We need to know that energy consumption represents the single largest controllable operating expense for a building, typically a third of variable expenses.
我们应当认识到，能源消耗是建筑物的唯一一项最大的但可控制的营运费用，一般为可变费用的三分之一。
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