It has built more than 1000 technically challenging construction projects in Bangladesh and abroad.

Of course, doing so in practice would still be a technically challenging undertaking.

K2 is considered the world's most treacherous and technically challenging mountain.

Grade 4s will contain many technically challenging parts and some syncopation.

And Arctic oil remains a marginal product due to the technically challenging nature of drilling up there.

Many sections of the line were considered technically challenging, especially the tunnels, construction of which had been called 'notorious' at the time.

The authority has said that schedules have changed in many cases because the projects proved to be more complex or technically challenging than had been expected.

The procedure has not been adopted widely because it is technically challenging and blood loss can be significant.

Agreed this is a very nice description of a complicated and technically challenging study.

But he added that much work remained on technically challenging modifications and new safety features.