柯林斯詞典lead-in /?li?d??n/ (lead-ins) 1. N-COUNT A lead-in is something that is said or done as an introduction before the main subject or event, especially before a radio or television programme. 前奏; 開場白 返回 lead-in劍橋詞典something that introduces something else , such as the words and music that are used to introduce a television programme 引子；過渡語；開場白；過場音樂 返回 lead-in