catalystKK [ˋkætələst] /ˈkætələst/发音名词1催化剂、触媒化学The reaction speeds up considerably when a catalyst is added.加入催化剂后,反应速度明显加快。2催化剂、促成因素、导火线Her speech became the catalyst for widespread political change.她的演讲成为广泛政治变革的催化剂。用这个字练口说→