Ad stands for admission, mostly from the application for American scholarships. Generally, those who don't win the prize are called ad, and those who win the prize are called offer. American university ad refers to general admission without any scholarship. Ad literally means admit. Students who have received AD from American universities have been successfully admitted to the school, but they have to bear the school expenses themselves.

Introduction:

Universities (colleges) are a kind of schools that implement higher education, including comprehensive universities, specialized universities and colleges. It is an organization with unique functions, an institution of higher learning that inherits, studies, integrates and innovates advanced academic knowledge, and is interrelated with social, economic and political institutions.

It is not only the product of the development of human culture to a certain stage, but also a unique culture gradually formed on the basis of long-term school-running practice through historical accumulation, self-efforts and external environmental influence.