This is an acceleration on March, when revenue passenger kilometers increased 2.9%.

这是3月份的一个加速，付费旅客周转量增加了2.9%。

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Around 300 trains should be able to speed through the Gotthard's twin tubes every day, at up to 250 kilometers per hour (155 mph) for passenger trains, according to planners.

根据设计者的设计，将允许有每天大约300辆火车穿梭在圣哥达的双管隧道中，最高设计时速达250Km/h（155mph）。

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With the new round of speed hikes, passenger trains traveling between Beijing and Guangzhou, and on other key rail routes, will upgrade their speed to a record high of 200 kilometers per hour.

随着新一轮的火车速度的提高，北京与广州间的客运列车以及其他重要的铁路线上的客车将提高运行速度- 每小时200公里。

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Over the same two decades, global air travel doubled growing to four trillion RPKs (revenue passenger kilometers).

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But the relative proportion of total fuel use can be extrapolated by comparing passenger kilometers traveled versus tonne-kilometers for freight on the top 10 carriers.

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They worry more about tornadoes (130 deaths a year) than crossing the street (2, 708 deaths), more about commercial jets (0.03 deaths per 160 million passenger kilometers) than about driving at night (16, 480 deaths a year between 8 p.m. and 4 a.m.).

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