pure sample meaning in English

纯样

The pure sample with spinel structure can be easily prepared by optimizing the processing parameters . the typical product is limnio4 with the cell constant a = 8 . 235 and the powder size belongs to nanometer and sub - micrometer
表明用改进的柠檬酸配合法可以合成出单相正尖晶石limn _ 2o _ 4 ，其典型的试样组成为limn _ 2o _ 4 ，晶格常数= 8 . 235 ，粒度大小为纳米级。
With the empirical study on pure samples of the listed companies without their ownership transferred , the thesis uses the method of market model to detect the long - run extra stock returns of companies after their recombination of different forms
摘要选取控制权未发生转移型的资产重组事件的上市公司为研究样本，采用市场模型法从不同资产重组方式的角度对上市公司资产重组绩效的影响进行了研究。