nothing is set in stone 没有是一成不变的；万事无绝对

【例句】
I know nothing is set in stone at this point, but will these mechanics in all likelihood make it into the final game?
我知道现在一切都还没有定论，但是这些机制是否会保留到最后？

The season isn't over yet and nothing is set in stone.
联赛还没有结束，一切都没有最后决定。