Seamen , dockers , bank officials and customs officers , not to mention all the workers who actually grow , mine and manufacture the commodity that are exported , are all involved in the complex operation of world trade 海员,码头工人,银行职员,海关工作人员,更不用说那些实际上种植,开采,制造了出口商品的所有工人,他们都参与了复杂的国际贸易实务。