Three dollars. A flat fare with unlimited transfers throughout the entire subway system.
三美元。统一收费，也就是只要进了入口可以随意转车。
Use computer to run the pricing model, combination with xian subway model for empirical research, thus to predict reasonable fare level in future yeas.
并运用计算机对定价模型进行运算，结合西安地铁对模型进行实证研究，从而预测未来年度合理的票价水平。
What is more, the fare of the bus or subway is not a problem for the people of 70 or above, who can't go out very often.
其实，对于不可能经常外出的70岁以上的老人而言，公共交通的费用并不是问题。
What is more, the fare of the bus or subway is not a problem for the people of 70 or above, who can't go out very often.
其实，对于不可能经常外出的70岁以上的老人而言，公共交通的费用并不是问题。
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