Sentence examples similar to a continual challenge and from inspiring English sources

The calculation of robust population predicted no-effect concentrations (PNECs) from NOEC or EC10 values is a continual challenge in ecotoxicology, and several methods are used tackle it (EC 2003; Selck et al. 2002).

But the biggest magnet for new terrorists will always be the American heartland, whose prosperity, self-confidence and openness are a continual challenge to the frustrated and fanatical.In fact, the threat by new brands of nihilism, at home and abroad, may well be remembered by future historians as one of the main themes of Bill Clinton's presidency.

The experience should be purposeful, provide opportunities for reflection, present a continual challenge to the student, and incorporate active learning, with the student an active participant in all stages of the experience from planning to evaluation.

The show's writers and producers face a continual challenge to come up with new twists and surprises for Homer Simpson and company.

SOLVING problems". I could see a little light bulb go off in her head... and it is a continual challenge each day to look at that fact like a fun challenge, rather than a chore or an insurmountable obstacle.

Maintaining focus and just pushing for the next goal is a continual challenge.

Developing plans consisting of projects that undergo "starts" and "stops" during their varied development phases is a continual challenge faced by the district staff.

But protecting civilians was "a continual challenge".

Fixing the gaps (which will pose a continual challenge) requires understanding as to why they occur.

Making ends meet on her retiree income is a continual challenge.

Apparently, taming the hostile airport is a continual challenge for travelers.