以消耗的车公里数最小为目标，建立大规模路网上空车调整问题的数学模型。
The mathematics model of empty car adjustment on large scale railway network was established which aimed at the minimization of consuming wagon-kilometers.
低于80%的可用率、单日单辆公交车运营的低公里数和运营收入占总成本的低比例是司空见惯的。
A low availability rate of less than 80%, a low operating km per day per bus and a low ratio of operating revenue to total costs are common.
丰田佳美每周的租金是300元。超公里数不用罚钱，但是还车时你要加满油。
The weekly rate for a Toyota Camry is $300. There is no charge for mileage, but you need to fill up the gas when you return the car.
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