[] knowledge of, or training in, the basic parts of a subject基础知识；基础训练◆The course will give you a good grounding in advertising.这门课程将为你打下扎实的广告基本功。 [, ]the act of keeping a plane on the ground or a ship in a port（飞机的）留地停飞；（船的）留港停航◆The airline collapsed, resulting in the grounding of its fleet for lack of cash.这家航空公司倒闭导致飞机缺乏资金而停飞。