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Ground Net Improvement of Substation变电站接地网的改造ground penetrating radar direct wave探地雷达直达波Ground Radio Navigation System Tacan"塔康"地面无线电导航系统Ground Control Operational Equipment地面控制操作设备Ground Support System Specifications地面支援系统规范Grounding technique of image devices医学影像设备的接地研究groundnut root knot nematode disease花生根结线虫病grounding protection against thunder防雷接地ground straight- shank twist drill磨制直柄麻花钻Groundwater vulnerability assessment地下水脆弱性评价