2. In science majors, such as mathematics, physics, chemistry, astronomy, biology, medicine, agricultural science, computer science, materials science, etc., information about important academic achievements can be retrieved through sci. Periodicals are the main form, but sci is not limited to periodicals, and some academic conferences and patents can also be retrieved.
3. Take the environmental field as an example. The famous periodicals include Environmental Science and Technology, Perspective of Environmental Health, Water Research, Environmental International, Journal of Hazardous Materials, Environmental Science, etc. These are first-class periodicals in this field, and other fields also have their own periodicals of different grades.