groundinadj.磨口的groundn.地面；地方；根据；主题；立场；水平；背景v.使停飞；困在家中；放在地上；使 ... 搁浅；打基础动词grind的过去式和过去分词形式ground section磨片ground motions地震动ground trainer地面教练设备ground holding地面等待ground yarding地曳式集材机ground station地球站ground grading平整地面grounding form接地形态ground sliding滑跑ground service地勤