The Raptor faced a number of technological hurdles this year and last.

There are still technological hurdles to an effective defense against ballistic missile attack.

The expense and the technological hurdles convinced Federal officials that private industry was better equipped to define the state of the art.

But most challenging will be the technological hurdles, which many experts say are beyond current capabilities.

One of the next big technological hurdles for laptops will be color display screens.

Skeptics say the costs are staggering and the technological hurdles huge.

Prizes are a common way of addressing the greatest technological hurdles facing a society.

In the past, technological hurdles and privacy concerns have prevented the collection of test results.

If we can overcome this technological hurdle, however, hydrogen fuel cells could have a major impact on global energy.

The system did not catch on due to technological hurdles.