释义 n.下面；底面adj.水面下的 实用短语undersurface filling液面下灌注undersurface loading液面下灌装underside undersurface下面undersurface collection底层表面集电,底层表面集电流undersurface circulation大洋表层以下的环流undersurface pressure下表面压力undersurface nuclear explosion地下核爆炸laser in undersurface flap keratomileusis角膜瓣背面磨镶术,激光角膜瓣背面磨镶术wing undersurface机翼下表