mainstayKK [ˋmenˏste] /ˈmeɪnˌsteɪ/发音名词1支柱、中流砥柱、台柱She has been the mainstay of the team for a decade.十年来她一直是这支队伍的中流砥柱。2主要来源、命脉Tourism remains the mainstay of the island's economy.观光业仍是这座岛屿经济的命脉。3主食、主要成分Rice and beans are a mainstay of their daily diet.米饭和豆类是他们日常饮食的主食。用这个字练口说→