prób i błędów Englisch:

I found the answer by trial and error, which obviously took little more time.

Edison made a light bulb by trial and error. He carried out thousands of experiments before he succeeded.

There aren't any instructions with it - it's just a matter of trial and error.

Within a year of learning the game, mostly through trial and error, it became evident that Phiona had a special gift

There were lots of keys, but we found the right one by trial and error.

I learned that by trial and error

Most of their discoveries were made by trial and error.

The professor came up with the right proportions through trial and error.