To sand flat edges or complex profiles, whether solid veneer or substrate material.

砂光平面边部或剖面，实木单板或基材。

youdao

Near some of the underwater high land in the sand flat environment, there may exist purer quartz sandstones, which may be a good reservoir.

砂坪微相的一些水下高地存在可能成为有利储层的纯净的石英砂岩。

youdao

Pale, sand-coloured, flat-roofed buildings and laneways lead to the wide, beachfront promenade.

BBC: Qatar��s culture heartbeat, if you can find it

Fresh from constructing a sea-level canal through the flat Egyptian sand, de Lesseps was determined, without having set foot in Panama and after only the vaguest of topographical studies, that his project through the mountainous central American isthmus would also be a sea-level canal, requiring no locks to cope with changes in altitude.

ECONOMIST: The Panama Canal

What should be a shallow, marshy environment, complete with a complex set of channels, islands and sand bars is becoming a flat, scoured bay subject to the full force of the Adriatic.

ECONOMIST: Flood barriers