Minerals are often found deep in the ground.

矿物往往埋藏在地层深处。

《新英汉大辞典》

They sank the post one foot deep in the ground.

他们把这根柱子在地下埋了一英尺深。

youdao

They sank the post two feet deep in the ground.

他们把这根柱子在地下埋了两英尺深。

youdao

These are to bury the old man deep in the ground, and to bring religion to his uncle's mentally sick child.

VOA: special.2010.12.26

Lettuce seeds are small, so do not place them too deep in the ground.

VOA: special.2009.04.28

The snow is so deep in some areas that it will stay on the ground well into the hot days of summer.

VOA: special.2009.08.12

"After you bury your stuff deep in the ground, you would, then, plant trees on top, " Moalin told Ayrow in a recorded conversation.

CNN: STORY HIGHLIGHTS

The whole construction is similar to an oil well on land, with the weight of the drilling fluid designed to contain the geological pressures deep in the ground.

FORBES: The delicate art of sucking up

All wine estates produce Champagne in roughly the same way, and most cellars look similar massive rooms deep in the ground that are cool, damp, dark and dusty.

BBC: A cellar-by-cellar tour of Reims