groundmassn.合金的基体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groundwater evaporation coefficient潜水蒸发系数groundwater science and engineering地下水科学与工程groundwater environmental repairing地下水环境修复Ground Environmental Control System地面环境控制系统ground-to-air missile equipment地空导弹武器系统Ground Operations Requirements Plan地面作战需求计划Ground Control Interception Station地面控制拦截站Ground Support Equipment Laboratory地面支援设备实验室ground-controlled approach system地面控制进近方式ground straight-shank twist drill磨制直柄麻花钻