在课程的前一部分，见过宏观的热力学处理方法。
So in the earlier part of the course, and saw the macroscopic thermodynamic treatment.
该方法具有前处理效果好回收率高，操作简便的优点。
The pretreatment Possesses the advantages of high recovery and easy operation.
应用数理统计方法研究了样品前处理过程中被测成分硒的损失与污染。
The loss and pollution of selenium during the sample pretreatment were also studied.
应用数理统计方法研究了样品前处理过程中被测成分硒的损失与污染。
The loss and pollution of selenium during the sample pretreatment were also studied.
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