... actual cost roll-up 数据成本累加（滚动） actual cost system 数据成本系统 actual cost total 实际成本总计 ...
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恰恰相反，标准成本系统为需要报送的成本数据的类型和形式提供了指南。
Instead, a standard cost system provides guidance in determining the type of cost data needed and the form in which the data should be reported.
本系统设计简单，成本低廉且精度较高，可以很方便实现温度和大气压数据的采集。
The system design is simple, low cost and high precision, and can be easily realized temperature and pressure data collection.
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