·2,447,543篇论文数据，部分数据来源于NoteExpress
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.
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。
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