NOTE ON USAGE 用法:
Compare cargo, freight and goods *试比较 cargo﹑ freight﹑ goods这三个词. These words are used before the names of vehicles that transport things rather than passengers. They can also refer to the objects transported 这三个词均用於货运的（而非客运的）运载工具名称之前, 也可指所运载的货物: A cargo plane/ship/vessel carries cargo. 货运飞机[货轮/货船]是运载货物的. * A goods/(US) freight train carries goods/freight. 货运列车是运载货物的. （‘货运’一词, 英式英语用goods, 美式英语用freight.） * A passenger train sometimes also has goods wagons/(US) freight cars. 客运列车有时也有货车车厢. （‘货车车厢’英式英语为goods wagon, 美式英语为freight car.） 
Cargo [C] can also indicate a particular load that is being transported *cargo还可指所运载货物的量: A cargo of steel was lost at sea. 有一货轮的钢材在海上遗失了. 
Freight [U] also indicates the action of transporting *freight也可指运输工作: We can send it by air/sea freight. 我们可以空运[海运]. * What is the freight charge? 运费多少钱? In this sense freight can also be a verb *freight意为运输时, 也可作动词: You can freight your belongings by air or sea. 你可把东西经空运或海运运去.