błąd, który dużo kosztuje

For, as Richard said the wrong choice could prove an expensive mistake.

That brought us what we might expect, which is some expensive mistakes.

In Venice, this probably would have been the beginning of an expensive mistake.

Then they can say that the other fellow made an expensive mistake.

To fight him might be a far more expensive mistake.

It is likely to become the most expensive mistake in the history of technology.

Still, networks don't seem to learn from their expensive mistakes.

In the long run, this is truly an expensive mistake.

Believe me, I made - have been making - lots of expensive mistakes.

Cheating the government out of its taxes can be a very expensive mistake.