我原来在一所中学当教师,日常工作就是备课、上课、管理学生,对外界的事知之不多。学校中有几位老师,业务上很不错,他们都加入了民主党派,有民盟、民革等。当时我不太理解,他们为什么不加入共产党而加人民主党派。又见他们常请假参加党派活动,我更不理解了,心想,民主党派能有什么活动,活动又有什么用呢? I used to be a teacher in a middle school. My daily routine is to prepare lessons, take classes, manage students, and know little about the outside world. There are several teachers in the school who are very good at business. They all joined the democratic parties, the NLD, the Revolutionary Revolution and so on. At that time, I did not quite understand why they did not join the Communist Party and join the democratic parties. Seeing that they often leave for part-time activities, I do not understand them any more. I wonder what activities can be played by the democratic parties and what is the use of activities?