Number the kinds of movies in the order you hear them.这句是什么从句?句中you hear them做什么成分,
如果是Number the kinds of movies in the order while/as you hear them。则变成状语从句啦。而这句话在英语书上的翻译是“按听到的顺序给这几种电影编号”，那么翻译的就不正确啦。