Today, with the rapid development of science and technology, people's material, spiritual and cultural needs are increasing day by day. Small-scale, low-level science popularization activities have not adapted to the development of the times. "Understanding science", a large "science popularization", has become an urgent need for all Major issues of social concern. With the in-depth development of science and technology, science and technology have gradually formed their own concepts and logical systems, and they have gradually disappeared from the public's sight and common sense. It is difficult for people to accurately understand the knowledge structure and experience of the past. It is difficult to judge the social value and significance of science and its various changes, which has made some science and technology become knowledge barriers that lie on the road of human development. What does this text mean? ['There is a gap between the scientific literacy of citizens and the rapid development of science.', 'Difficulties in improving the level of science popularization.', 'Modern science and technology may become barriers to knowledge.', 'The necessity of improving the level of science popularization under the new situation.']