Proverb: years of experience (age) bring wisdom; an older person's experience is more valuable than possessions or theory.
若い意見も大事だが、亀の甲より年の功だから先輩の言うことも聞いたほうがいい。
Young opinions are important, but experience counts — you should also listen to what the senior says.
祖父は料理歴が長い。亀の甲より年の功で、ちょっとしたコツを教えてくれた。
My grandfather has cooked for years. By virtue of his experience, he showed me a few useful tips.
『亀の甲より年の功』ということわざを、面接で年配の受験者を尊重する根拠として挙げた。
I cited the proverb 'experience counts more than a turtle's shell' as a reason to respect older applicants in the interview.