The principles of microstrip balun and printed dipole were analyzed, and the antenna's ground plane was extended and shaped to form the reflecting structure. 分析微带巴伦和印制偶极子的工作原理，延伸并成形天线的地平面以得到反射结构。
用作名词(n.)
There is a stable ground state of the atom. 原子有一个稳定的基态。
We have concentrated on the ground electronic states of diatomic molecules. 我们曾主要集中注意双原子分子的电子基态。
ground level英英释义
Noun:
the height of the ground on which something stands;
"the base of the tower was below grade"
the floor of a building that is at or nearest to the level of the ground around the building
