一日 ,孙子在家里跟爷爷李龙谈起了他从大学回来度假时的旅途见闻。他对车上的服务情况还算满意 ,但觉得旅客的文明卫生习惯需要加强。他给李龙举了两个例子 :一个是车内有人在“无烟车箱”内的座位上吸烟 ,一个是旅客随地扔掉果皮和包装袋等杂物。听着他的叙述 ,李龙想起了几 One day, the grandson talked with his grandfather Li Long at home about the journey he had made when he returned from college. He is satisfied with the service conditions on the car, but he feels that the passenger’s cultural hygiene habits need to be strengthened. He gave Li Long two examples: One is that someone in the car smokes in a seat in a “smoking-free car box”, and one is where passengers throw away skins and bags and other debris. Listening to his narrative, Li Long remembered a few