地下鉄は地面の下を走る。の英語

Subways run under the ground.

Pretty soon there was a subway going back and forth underneath the Little House.

Run pipes under the floor.

of water, to flow beneath the ground's surface

a subterranean stream

get down to the ground

to bury something under the ground

to trespass on another's ground―（人の領分を侵すの意味なら）―encroach on another's province

to trespass on another's ground―（領分を侵すの意味なら）―encroach on another's province

to rest in peace

go underground

a boardwalk laid across muddy ground

pick the ground with a pickax

People walk over the ground.

to trespass on another's ground

an explosive mine hidden underground

Everybody put their foot down.

grind one's heel into the earth

low space beneath a floor of a building

The steam in the bowels of the earth find vent in the craters.

be couched upon the ground

the water that is contained within the earth

Scuttling is done by opening valves below the waterline.

with the bottom lodged on the ground

to drag something along the ground

undermine a wall

The plank froze to the ground.

Man walks over the ground.

dig up the ground

underneath the ground