Any of several Old World herbs of the genus Medicago in the pea family, having clusters of small, usually yellow flowers and compound leaves with three leaflets. Several species are important for fodder and green manure.是什么意思_Any of several Old World herbs of the genus Medicago in the pea family, having clusters of small, usually yellow flowers and compound leaves with three leaflets. Several species are important for fodder and green manure.在线翻译_英语_读音_用法_例句