chapter one  international trade
  1.1  international trade
  1.2  definition of international trade
  l.3  reasons for international trade
    1.3.1  resource reasons
    1.3.2  economic reasons
    1.3.3  other reasons
  1.4  the differences between international trade and domestic trade
  1.5  forms of international trade
    1.5.1  export trade, import trade and transit trade
    1.5.2  direct trade,indirect trade and entrepot trade
    1.5.3  visible goods trade and invisible goods trade
    1.5.4  barter trade and free-liquidation trade
  1.6  benefits from international trade
    1.6.1  economic growth