Olanlar geri alınamaz. -
What happened can't be undone.
Eğer varsa yapılmamış olarak bıraktıklarını yap. -
Do what you have left undone, if anything.
Could you undo my buckle for me?.
Fortunately, we can undo most of the damage to the system.
So far as the ape was concerned, Sabor reasoned correctly. The little fellow crouched trembling just an instant, but that instant was quite long enough to prove his undoing.