/ˌɪntrəˈdʌktəri ||; ˌɪntrəˈdʌktərɪ/adj1 happening or said at the beginning in order to give a general idea of what will follow 介绍性质的: an introductory speech/chapter/remark 引言；绪篇；开场白
2 intended as an introduction to a subject or activity 初次经历的，初阶的（某个科目或活动）: introductory courses 基础课程