A gas leak aboard a sealed bus could cause a major fire if it grew dense enough and was ignited by a spark.

在一辆密封的公交车上，如果燃气发生泄漏达到一定密度并有火花引燃就可能造成一场大火。

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Like many vehicles in Chengdu, the bus ran on natural gas rather than gasoline.

与成都市许多车辆一样，这俩公交车的燃料是天然气，而非汽油。

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For one thing, we should go to work by bus or by bike, in order to reduce the tail gas.

一方面，我们应该乘坐公共汽车或骑自行车去上班，以减少尾气。

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Pulling back on federal spending now is equivalent to an unemployed worker refusing to go on job interviews in order to save on gas or bus fare.

CNN: Spending cut. Now, GOP, where are the jobs?

Taking the witness stand on the first day of his trial, Dr Ovens recalled how Mr Railton had spoken of using VX nerve gas on a bus in Caterham.

BBC: Man 'planned poison attack on bus' in Surrey

This third wave will also see a significant number of new heavy-duty natural gas vehicles, including bus and truck fleets.

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