give a discountＴ 基本例句 打折扣 Use economics principle and method, monopoly, season ticket of sports give a discount, competition balanced, city have sport cost and income of group, etc. issue analyse to job. 应用经济学原理及方法，对职业体育中的垄断、季票打折、竞争平衡、城市拥有运动团队的成本和收益等问题进行分析。 cnki