But live roots or weeds might remain below the surface.

VOA: special.2009.07.07

This tactile mastery attests to something remarkable that's happened over the course of the poem, somewhere below the surface of the poem, somewhere between the lines.

这种触觉的掌控证明了一些发生在诗歌里的意义非凡的事情,这些事情贯穿诗歌的整体，暗藏在诗歌的表面之下，深埋在字里行间。

耶鲁公开课 - 弥尔顿课程节选

Or it may still exist deep below the surface.

VOA: special.2009.12.30

These lay deep below the surface of the Earth.

VOA: special.2009.03.04

"It is a transponder that is put about two feet below the surface.

VOA: standard.2010.07.22

Scientists said the glass came from material created as deep as three hundred kilometers below the moon's surface.

VOA: special.2009.07.29

They also use radar to help spot oil just below the water's surface.

VOA: standard.2010.07.05

President Mohamed Nasheed and 11 of his government ministers, plus the vice president and Cabinet secretary, donned scuba gear and plunged six meters below the shimmering turquoise surface of an Indian Ocean lagoon.

VOA: standard.2009.10.17