基本解釋[經(jīng)濟學]外部效益理論英漢例句雙語例句It is discussed from four aspects: firstly, the gist of the external benefit's return theory is introduced;三是從財政管理和城市開發(fā)兩方面介紹了外部收益還原的方式；theory of external benefit更多例句專業(yè)釋義經(jīng)濟學外部效益理論