例句與造句

1. But in the second phase , all of these theories can still be categorized into 4 kinds : dynamic comparative advantage theories , such as the new factors theories by baldwin and kenen , the life - cycle theory by vernon and hirsh , etc ; intra - industry trade theories such as product differentiation model by stiglitz and dixit , the strategy trade theory by spense , brander and krugman , and so on ; the endogenous trade theory such as technology overflow effect and learning curves theory by romer and krugman , the neo - classic trade theory by tucher and young , and the like ; and the competitive advantage theory by michael porter
   在這一時(shí)期,經(jīng)濟(jì)學(xué)家們提出了形形色色的理論,出現(xiàn)了“百家爭(zhēng)鳴”局面?；旧峡梢詺w于以下四大類型:一是動(dòng)態(tài)的比較優(yōu)勢(shì)理論;二是產(chǎn)業(yè)內(nèi)貿(mào)易理論;三是內(nèi)生國(guó)際貿(mào)易理論;四是競(jìng)爭(zhēng)優(yōu)勢(shì)理論。各個(gè)階段的比較優(yōu)勢(shì)理論有其時(shí)代特點(diǎn),但一個(gè)共同點(diǎn)是:比較優(yōu)勢(shì)始于成本差異,并一直沒(méi)有突破成本差異,而不考慮產(chǎn)品的附加值。
2. It's difficult to find learning curve theory in a sentence. 用learning curve theory造句挺難的