None of this work was taken very seriously at the time, and only small experimental systems were developed through the 1960s.

The experimental systems approved in the last week will only work within very limited geographic areas.

Time to add stress to the experimental system and observe how the subjects changed.

Overall performance was considered good for an experimental system.

At 11 stops along the route, a new experimental system was installed late in 2006.

Best if we do not mention an experimental medical system using nanotechnology, either.

These sites are not labelled in the experimental system we have used here.

Based on the positive paper, I'd probably be using mice as an experimental system.

The first experimental system of this type was established in 1959.

Test range trials of the first experimental system were conducted in January 1952.