基本解釋[經(jīng)濟(jì)學(xué)]依時(shí)變動共變量詞組短語短語time -varying covariate duration model 之持續(xù)時(shí)間模型time-varying covariate更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)依時(shí)變動共變量