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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But if I take a bus, the bus only emits about a quarter of a pound per mile that the bus drives per person in the bus.

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He said that since November 2011 Metro services have increased by about 1, 500 passengers per day and use of Belfast's bus based park and ride services had risen by 15%.

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Things like the number of computer instructions per clock cycle, the bandwidth of the RAM bus, and the overall efficiency of the architecture are at least as important as the raw clock speed at which a processor runs.

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