Some experts believe that the fast-breeder represents a key advance which will realize nuclear power's full potential.

It also became a noted research facility, developing several key advances in armament design and manufacture.

Another key advance, less generally appreciated, is a set of rules for naming groups within any hierarchical classification.

The key advance to the Blackett design was the way the sighting head was aimed.

One key advance in the Kestrel was the use of a pressurised cooling system.

In botany, flowers are the key evolutionary advance made by flowering plants.

Almost all the key advances in defence have come from contractors.

Through the year two key theoretical advances were made.

But the key technological advance that has allowed the Soviets to speed up construction is the automation of welding.

During this time two key Polish advances began.