A or an before vowels: sound over spelling
先写下记得的内容，再查看解释。不要填写个人信息。
查看解释
The indefinite articles 'a' and 'an' both mean 'one' or refer to a non-specific singular countable noun. They do not alter the meaning of the word that follows. The variation exists purely for phonetic ease: placing 'an' before a vowel sound prevents two vowels from colliding awkwardly in rapid speech.
David earned a university degree in computer engineering.