I always travel by underground.

我总是乘地铁。

《牛津词典》

youdao

Now I can come to school by underground instead of by bus.

现在我可以乘地铁来学校而不是乘公共汽车。

youdao

The group's "Inspired by Muhammad" posters are now on view all around London, including in stations of the Underground and at bus stops.

VOA: standard.2010.07.19

For weeks, South Korean officials delayed expected announcements it would join, but experts say they had no other choice after Monday's underground nuclear weapons test by the North.

VOA: standard.2009.05.26

But we're not going to wait forever,". Kelly said preparations have been made for a visit Sunday by IAEA inspectors to the partially-underground enrichment facility near the city of Qom that Iran recently acknowledged it has been secretly building.

VOA: standard.2009.10.24

Services from and to Kings Cross run to a special timetable and are replaced by Underground between Kings Cross-Finsbury Park.

BBC: Easter travel information

Gates, arranged in long, boxy concourses set way out in the field, are linked to central terminals by underground trains.

NEWYORKER: Situation Terminal

Con Ed officials said they expected to restore power to those customers and others served by underground electric equipment within four days.

WSJ: Millions Without Power in New York, New Jersey and Connecticut After Storm