frustrated a.灰心的,沮丧的 (修饰人) e.g. I felt frustrated at that time. 那时我觉得很沮丧。

frustrating a. 令人灰心的,令人沮丧的.(修饰物,事件) e.g. Watching movies to learn English is frustrating because the people speak too quickly. 通过看电影来学英语是让人灰心的,因为剧中人物说话太快了。

类似的还有:interesting令人感兴趣的 disappointing令人失望的；interested 感兴趣的 disappointed 失望的 自测： All of us were _____at the ____news. A.frustrated,frustrated B.frustrated,frustrating C.frustrating,frustrated D.frustrating,frustrating . . . . . . . 答：B。