告诉你SS和SSR哪个好

The five divisions which compose the University Police Department– patrol, investigation, crime prevention, security staff, support– are an integrated team striving to achieve excellence in police protection and to ensure a high quality of student-faculty life by promoting a tranquil, safe atmosphere conducive to the objectives of the University. The department is dedicated to the protection of the university properties to ensure the beauty, security, and safe function of the campus grounds and resources.