No matter the age, a child is a child.
- Peu importe l'âge, un enfant est un enfant.
No matter how long it takes, I will finish the work.
- Peu importe le temps que ça prend, je finirai le travail.
She'll never catch up with them, no matter how hard she works.
Did you fail your exam? - Yes, but no matter. I'll just study harder next time.