(someone) never left school

Translations
(кто-то) никогда не уходил из школы
Even though he graduated years ago, his fascination with learning shows that he never left school.
Хотя он уже давно закончил учёбу, его увлечение учёбой показывает, что он никогда не уходил из школы.
Definitions
This phrase refers to a person who has remained in an academic environment for a long time, often as a student, teacher, or academic, and has not moved on to other careers or life experiences outside of school. It can also imply that someone still behaves or thinks like a student, even as an adult.
Words
someone

pronoun
кто то
never

adverb
никогда
left

verb
покинул
school

noun
школу