ground level

名词 ground level:

1. the height of the ground on which something stands
   同义词：grade
2. the floor of a building that is at or nearest to the level of the ground around the building
   同义词：ground floor, first floor

1. The lowest habitable story of a building, usually below ground level.
   地下室可居住的最低的建筑物楼层，通常在地平面以下
2. The lowest sill, block, or timber supporting a building, located at or below ground level.
   底基用来支撑建筑物的最低的基木、砌块或木料，位于地面或低于地面的
3. An underground defensive position with a fortified projection above ground level for gun emplacements.
   掩蔽壕，地堡一个地下防御工事，有一个高干地面的，用来放枪的防御射击处
4. The part of a plant, usually at ground level, where the stem and roots merge.
   根颈通常位于地面的、茎和根汇合的植物的那部分