competition in the world market remains strong and constant and it forces profit to zero for each firm and that implies that the efficiency improvements are passed along to consumers in the form of lower prices.
国际市场上的竞争仍然普遍存在,激烈万分,这迫使公司的利润趋于零,也就是说消费者享受到了由于生产效率提高所带来的价格下降的好处。[收起]