Significados de unfruitful years em inglês

After this deed Harald Greyfell reigned as King of Norway for five troublous and unfruitful years.

Frustrated after two unfruitful years, he dumped the task onto two underlings, John Bardeen and Walter Brattain.

It is said that his father never smiled again, and upon his death, his nephew Stephen was king during twenty unfruitful years.

As the Israelites in their faith bore the Ark of the Covenant through the wilderness, so the poor bore their hope through the unfruitful years.