udowodnić, że jest się kompetentnym

He earned his wings as a commercial pilot with over 10,000 flight hours.

Will the trainees finally earn their wings in the final episode?

Of some 25,000 applicants, 1,850 were accepted, and 1,104 earned their wings.

Reckless angel in training Porter has been sent to earth to earn his wings.

He earned his wings by the end of 1915.

He took flight training and earned his pilot's wings that year.

This year, he said, his 6-year-old daughter could "finally begin to earn her wings," by joining in the vigil.

After college in California, he joined the service and earned his wings in 1966.

And as important, why did Chen now want to earn his wings?

In 1974, the first six women aviators earned their wings as Navy pilots.