The concept and practice of the study circle appeared in the late nineteenth century.

The basic concepts of the drive appear to be the same.

The concept appears in myriad different ways, and is used throughout the article.

The concept has also appeared in many forms of popular entertainment.

The concept of peace appears to be more complex for Song.

The concept appeared in multiple forms of media during the mid-1970s.

Thus, the same concept can appear in different fields of knowledge.

The concept of "China proper" also appeared before this 1795 book.

In the final report adopted today, however, this appropriate and necessary concept does not appear.

The concept of effect size appears already in everyday language.