The sentence "'breakthrough was achieved" is correct and usable in written English.
You can use it when you want to express an accomplishment or progress that has been made. For example, "After months of hard work, the lab team finally achieved a breakthrough in their research."
The president's spokesman, Joe Lockhart, said that, as expected, "no breakthrough" was achieved.
A breakthrough was achieved in October, resulting in a nine-point draft agreement.
This breakthrough was achieved by a combined strengthening of three different species of precipitates.
Delayed breakthrough was observed for higher bed depth, while faster breakthrough was achieved for enhanced flow rate and inlet concentration.
In the recent test series in early 2010 the first breakthrough was achieved when a mock-up has survived over 1000 cycles at 10 MW/m2 unscathed.
The breakthrough was achieved by bonding a layer of light-emitting indium phosphide onto the surface of a standard silicon chip etched with special channels that act as light-wave guides.
They stand like rocks on the beach, unblinking, their clothing worn to rags, silently communing, until "Breakthrough" is achieved and they ascend in a trail of fire into the skies, to join the greater Power.
The United States faces a prosaic daily threat: Many more young American men and women will die in Iraq and Afghanistan over the next several years if no Iranian breakthrough is achieved.
If a major breakthrough is achieved in the field of solar-energy conversion, Saudi Arabia can be a leading producer and exporter of solar energy in the form of electricity.
This technological breakthrough is achieved by using proprietary algorithms and a new approach based on a leading theory of artificial intelligence, the Marvin Minsky's Frame Theory.
