The reason why universities use A is because the initial letter of the university is U, which is a consonant letter, and A is used before words that start with consonants (including /w/ and/j /j/)；; When followed by a word that begins with a vowel letter, use "an". In addition, use a (or an) before countable nouns, and do not use a (or an) before uncountable nouns. The' initial letter U' of Extended Data University is a consonant, so it is necessary to modify the university with A. The English pronunciation of the university is [ju:nv:sti], and the American pronunciation is [junvrsti], which is a noun meaning "comprehensive university" in Chinese. University personnel; In addition, the top ten universities in the world are Harvard University, Massachusetts Institute of Technology, Stanford University, University of California at Berkeley, Oxford University, California Institute of Technology, Cambridge University, Columbia University, Princeton University and Johns Hopkins University.