quantitative PCR定量PCRquantitativeadj.数量的；定量的quantitative management of scientific research科研量化管理quantitative structure-retention relationship定量结构-保留相关quantitative structure-property relationships定量结构-性质相关性quantitative structnre-retention relationship定量结构-色谱保留相关quantitative structure-biodegrad relationship定量结构-生物降解性能关系quantitative analysis of agricultural chemicals农药定量分析Quantitative structure-activity relationships定量构效关系quantitative structure - property relationship定量结构-性质相关quantitative structure -retention relationship定量结构-色谱保留关系Quantitative Structure- Retention Relationship定量结构-保留相关关系（QSRR）