ground normal level地面高度
ground-level[测] 地水准面;地面模式;当地一级;地面级
design ground water level设计水位
ground indicator level loader落地装载车
Ground Wconsumedr Level公开水位
ground d level contour地面水平等高线
ground indicator level source地面源
ground floor level地面层水平
N-UNCOUNT（不可数名词） If something is at ground level, it is at the same level as the ground, as opposed to being higher up or below the surface. 底层 [oft prep N]
The hotel is set on three floors. There's a bar and cafe at ground level.
旅馆有三层楼。底层有个酒吧和咖啡厅。