lead-inn1 introduction to a subject, etc 引子; 引言; 引论 He told an amusing story as a lead-in to the serious part of his speech. 他讲了一个有趣的故事作他演说中重要内容的引子.2 wire connecting an aerial to a radio or television set （收音机或电视机天线的）引入线.
牛津英汉双解词典