Sentence examples for challenging effort from inspiring English sources

These concerns taken together with the flow-based technology makes the validation of flow cytometry assays a challenging effort.

Likewise, designing privacy policy statements to fulfill informational needs of participants and specify their privacy preferences has been seen to be a challenging effort.

While Visa, American Express and others are looking to capitalize on the changes taking place in the payments industry, it is a challenging effort.

Getting here has required a long, challenging effort, but the results for Enron investors are unprecedented".

But after dawn on Saturday, a half dozen countries loudly intervened, challenging efforts to approve the accord.

Another group is challenging efforts for a new bridge to Canada, a controversial proposal that Mr. Snyder advanced on his own after legislators did not.

He has agreed with major broadcasters in challenging efforts to create more than 1,000 new low-power FM radio stations for schools, churches and community groups.