The thief who was traced by a policeman was in the blues. 【误译】警察跟踪的那个窃贼穿着蓝色的衣服。 【正确】警察跟踪的那个窃贼很沮丧。 说明:in the blues 意为“沮丧”、“忧郁”。in blue才是“穿着蓝色衣服”。