国家从事的贸易种类是多样的、复杂的，往往是有形贸易和无形贸易的混合。
Thekinds of trade nations engage in are varied and complex,often a mixture of visible and invisible trade.
国家从事的贸易种类是多样的、复杂的，往往是有形贸易和无形贸易的混合。
Thekinds of trade nations engage in are varied and complex,often a mixture of visible and invisible trade.
