brac.ingadj.(形容词)Invigorating or refreshing; strengthening:振奋精神的:振奋精神的或清爽的;令人奋发的:例句:a bracing tonic.提神的补品n.(名词)A support; a brace.支持;支柱Braces considered as a group.一组大括号【引伸】brac.inglyadv.(副词)