classes:  lecturer. the content of the subject should be further improved and updated to keep up with the current trend of the world.  curriculum. the content of the subject should be further improved and updated to keep up with the current trend of the world.  facility. the content of the subject should be further improved and updated to keep up with the current trend of the world.  general. the content of the subject should be further improved and updated to keep up with the current trend of the world.