由于英语水平实在是……,在翻译论文中遇见了几个不知道怎么翻的句子,望好心的高手帮忙
"Thus far we have abstracted from differences across countries that could create a comparative advantage basis for trade.Pollution-created nonconvexities will however interact with the more conventional determinants of trade in any world with nonidentical countries."


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