名詞 ground level:

1. the height of the ground on which something stands
   同義詞：grade
2. the floor of a building that is at or nearest to the level of the ground around the building
   同義詞：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樓層，通常在地平面以下
2. The lowest sill, block, or timber supporting a building, located at or below ground level.
   底基用來支撐建筑物的最低的基木、砌塊或木料，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，地堡一個(gè)地下防御工事，有一個(gè)高干地面的，用來放槍的防御射擊處
4. The part of a plant, usually at ground level, where the stem and roots merge.
   根頸通常位于地面的、莖和根匯合的植物的那部分