Travelling by train is more comfortable than travelling by bus.

坐火车旅行比坐公共汽车旅行舒服。

youdao

They're travelling by bus.

他们要乘公共汽车旅行。

youdao

Are they travelling by bus?

他们要坐公共汽车旅行吗？

youdao

travelling round by the bus and tube is much more reasonable.

乘公交和地铁到处转就更合理了。

公共交通更方便 - SpeakingMax英语口语达人

The number of passengers travelling by bus rose above 6m a day in April, the highest total since 1968.

ECONOMIST: Ken's record

In Britain, unlike abroad, white collar workers seem averse to travelling by bus, but they will happily catch a tram.

BBC: NEWS | UK | Trams: Chic but not cheap

Rather than spend a day travelling by bus to the nearest bank, recipients in rural areas can spend their time doing more productive things.

ECONOMIST: Telecoms