| 释义 |
quota sample
释义
配额抽样：一种抽样方法，根据研究对象的某些特征将总体分为若干类别，然后从每个类别中按一定比例抽取样本。
例句
1·Methods: the sample , after the nitric acid and the perchloric acid digestion was induced in the flame atom absorption spectrophotometer with standard series comparison quota .
方法：样品用硝酸和高氯酸消化后，导入火焰原子吸收分光光度计中，与标准系列比较定量。
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