Similar words: surface, surfaced, resurface, surface area, surface wave, hypersurface, surface mail, on the surface. Meaning: adj. beneath the surface.
61. The research on three segment type slight aeration subsurface wetland is a new way to enquire into the sewage treatment by constructed wetland.
62. Brightrays such as these are produced as impacts excavate and eject relatively unweathered subsurface material.
More similar words: surface, surfaced, resurface, surface area, surface wave, hypersurface, surface mail, on the surface, surface water, surface level, surface tension, scratch the surface of, surface-to-air missile, interface, poker face, poker-faced, user interface, customer interface, command line interface, graphical user interface, subsume, face-to-face, face to face, absurd, absurdly, absurdity, surf, surfer, surfing, surfeit.