subsurfaceWiktionary 原文中文来自 ECDICTadj.表面下的构词拆分sub-前缀Under, beneath. · Subsidiary, secondary.+surface词根/词干词源说明From sub- + surface.释义（英文）名词 NounSomething that is below the layer that is on the surface.(countable, mathematics) A surface which is a submanifold of another surface.形容词 AdjectiveBelow the surface.