Sentence examples for this is a breakthrough from inspiring English sources

This is a breakthrough".

This is a breakthrough, too.

"Maybe this is a breakthrough.

"This is a breakthrough in the magnetic world".

I want to believe that this is a breakthrough.

But then this is a breakthrough Olympics for women.

This was a breakthrough idea.

This was a breakthrough volume, even without the added blessing of the Booker judges.

"I didn't know whether this was a breakthrough or not.

Although this was a breakthrough match for Myskina, perhaps her biggest victory here has been maintaining her composure.

The Greens are optimistic about this being a breakthrough election.