基本解釋持續(xù)經(jīng)營的基礎(chǔ)專業(yè)釋義經(jīng)濟(jì)學(xué)繼續(xù)經(jīng)營假定持續(xù)經(jīng)營假設(shè)持續(xù)經(jīng)營