青云翻译

c: have been established on the differences in labor productivity, the introduction of labor productivity, international trade reasons to go to the field of production from the field of natural elements, if there is no difference, there is no comparison, so the difference is the foundation.

C: are based on the differences in labour productivity, labour productivity cause from the natural elements of the introduction of international trade areas go to the areas of production, if there is no difference, there is no comparison, so the difference is based.

C: All establishes in the labor productivity difference, the labor productivity introduction enable the international trade the reason to change to the realm of production from the physical features domain, if did not have the difference, then did not have the comparison, therefore the difference wa

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C: are based on the differences in labour productivity, labour productivity cause from the natural elements of the introduction of international trade areas go to the areas of production, if there is no difference, there is no comparison, so the difference is based.