International trado should follow the Law of Comparative Advantage, otherwise, we can not make any profit in the foreign trade.
周际贫易应遵守比较优势原理，否则，我们难以在外贫方面寻求利润。
2
This was followed by a comparative analysis of cash flow and profit and loss account.
其次是现金流量表与损益表比较分析。
3
While serving the domestic clients, Chinese Banks have their own advantages; they can also run at a profit by making most of their comparative advantages even if these are not monopoly advantages.