The epidemic is a common mental state, manifested by mutual infection or imitation of members of a society or group in the short term due to the pursuit of a certain lifestyle. According to the above definitions, Which of the following are not epidemic phenomena:. ['There are young people full of cowboys everywhere in the street.', 'When chatting online recently, many people are using the word "囧".', 'Spring is here and many people go to the countryside.', 'er the D. APEC meeting, many foreigners like Chinese costumes.']