But the cost is enormous and requires huge subsidies to producers and import restraints which have discouraged competitive exporters. 但是这样做的成本是很高的,并且要求对生产者以及进口进行大量补贴,而这个会挫伤出口竞争者的积极性。
Import restraints are equivalent to a sales tax and often apply to necessities. 进口限制相当于销售税,而且往往是针对必需品。