ground level
短语地水准面
词形变化
ground levels
复数
ground levels
释义与例句
n.
-
1.
The level of the ground, the surface of the earth.
定语 可数 不可数 -
2.
The ground floor (of a building).
可数 不可数 -
3.
Ground state, the stationary state of lowest energy of a particle.
可数 不可数 物理