出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第299页（204字）
比喻抓住要领，简单扼要，例在出发之前，领队提纲挈领地把这次的登山路线向大家解说了一番。
Before they set out to climb the mountain，the leader explained the main points of the route they were to take．