Examples
tā他yán gé严格àn zhào按照yuán zé原则bàn shì办事。
他严格按照原则办事。
He is a stickler for principles.
他的日常行为并不和他的原则相一致。
His daily behavior is not consistent with his principles.
诚实地回答你的问题对他来说是个原则问题。
It is a matter of principle with him to answer your questions honestly.