2。 Frustrate vt. 1. cause sb. to have feelings of disappointment 使沮丧,使灰心 The lack of evidence in this case is frustrating the police 警方因缺乏证据而感到很伤脑筋 2. cause the failure of sth 使挫败,使受挫折 The bad weather frustrated our hopes of going out 坯天气使我们打消了外出的念头
vt. 1. cause sb. to have feelings of disappointment 使沮丧，使灰心 The lack of evidence in this case is frustrating the police. 警方因缺乏证据而感到很伤脑筋。 2. cause the failure of sth. 使挫败，使受挫折 The bad weather frustrated our hopes of going out. 坏天气使我们打消了外出的念头。 2. Frustrate
3. Positive a 1.leading to a practical action 积极的,肯定的 positive advice 积极的建议; positive thinking 积极的想法 2. sure, having no doubt 确实的,明确的 It seems unlikely to me, but she seemed very positive. 这在我看来似乎是不可能的,但她却非常肯定
a. 1. leading to a practical action 积极的，肯定的 positive advice 积极的建议； positive thinking 积极的想法 2. sure, having no doubt 确实的，明确的 It seems unlikely to me, but she seemed very positive. 这在我看来似乎是不可能的，但她却非常肯定。 3. Positive