quantitativework定量操作quantitativeadj.数量的；定量的quantitative real time PCR实时定量PCRquantitative investigation定量研究quantitative precipitation定量沉淀试验quantitative joint imaging定量关节成像quantitativereal-timePCR荧光定量PCRquantitative metallography定量金相quantitative dynamic model定量动态模型quantitative sound changes音量变化Quantitative-trait locus数量性状位点quantitative sensory tests定量感觉检查