[Retracted] Building English Audio-Visual and Oral Mobile Teaching System Based on Virtual Augmented Reality Technology

Table 5

Use case description of audit course.

Use case name	Audit course
Range	Use of course review module
Level	User purpose
Major participants	Administrators
Relevant personnel and concerns	Concerns of relevant personnel
	The administrator wants all the data stored in the database to pass the audit correctly
Preconditions	The teacher has passed the identity authentication and applied for the course. The course is waiting for approval
Guarantee of success	Teachers can correctly apply for corresponding courses, the approved courses can be viewed by students, and teachers cannot modify the approved courses. All correct data can be saved in the database.