Sentence examples for an exceptionally challenging from inspiring English sources

He said the year had "been an exceptionally challenging and productive year for the N.R.C".

Chief executive Charles Philipps described 2011 as an "exceptionally challenging year" for Amlin.

Teasing apart the genetic and environmental causes of psychological and behavioral conditions remains an exceptionally challenging task.

Despite technological advances that have made it possible to identify thousands of phosphorylation sites simultaneously, identification of the substrates of a given kinase remains an exceptionally challenging task.

The NHS's chairman, Prof Grant, said last week: "We look, David, to you to provide us with the leadership as we take through an exceptionally challenging set of changes".

But by reducing the numbers of children and young people in custody and responding to staff with the training, support and the resources they need to do an exceptionally challenging job on behalf of us all.

The small number of cells makes such an analysis exceptionally challenging.

However, it makes sensitivity analysis of a single study component exceptionally challenging.

As one can easily imagine, experiments using human BM are exceptionally challenging for a variety of reasons.

More than half come from homes poor enough to earn free school meals and more than three-quarters do not speak English as a first language, making its intake exceptionally "challenging", in Whitehall jargon.Now when Mr Riley meets teenage students they seek advice about university.

Unfortunately, the discovery of aptamer pairs that can recognize distinct epitopes on a common target has proven to be exceptionally challenging.