lead-in

n 1 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.

layout, laze, lazily, laziness, lazy, lazy Susan, lazy-bones, lb, lbw, LCD, lea, leach, lead, lead off, lead pencil, lead sb. (on) to do, lead story, lead the way, lead to, lead up to, lead-poisoning, leaded, leaden, leader, Leader of the House, leaderless, leadership, leading, leading article (also leader), leading edge, leading lady, leading man, leading light, leading question, leading-rein, leaf, leaf-mould, leafage, leafless, leaflet, leafstalk,