groundern.滚球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 force陆军ground-nut花生ground risks地面险Ground arrow地箭ground stone基础石groundtacklen.锚泊装置ground nadir地面底点ground staffn.地勤人员ground staten.基态ground mould地面铸型,堆土木模