基于具有比例因子的某一工 C 概念估算 （ conceptual estimates ）tude estimates） 作范围 可行性估算（Feasibility estimates） 3.
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为了精确地估算产业部门不同类别与特征的大气污染源对指定区域的污染强度，采用暴露效率概念及其研究方法。
The concept and method of exposure efficiency are used to precisely estimate the pollution intensity at a specific region resulted by various air pollution sources of industrial sectors.
对于他来说，他可能要花费他的时间，一切从概念设计到成本估算，施工文件与承建商电话呼叫。
For his part, he might spend his time on everything from a conceptual design to cost estimates to construction documents to phone calls with contractors.
初步估算或者称为概念方案阶段估价主要基于概念设计方案进行估算，此时只明确了最基本的技术方案。
A preliminary estimate or conceptual estimate is based on the conceptual design of the facility at the state when the basic technologies for the design are known.
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