lead up to

逐渐导致

layman, 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-in, 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,