One of the principal challenges of microfinance is providing small loans at an affordable cost.

The ideas are aimed at solving the principal challenges rural Africa faces.

Whether and how justice will be sought for these crimes remains among Congo's principal challenges.

Its principal challenges, most commentators agreed, will be to cement its hold and confront an economic crisis.

Giving a performance that acknowledges the work's extravagance without beingovercome by it remains perhaps the principal dramatic challenge for vocalists.

One of the principal challenges of bridge is to find the best contract for you and your partner without being able to see the other hands.

Furthermore, one of the principal challenges in water management is the coordination of ministerial and regional interests within Iraq.

Stableford understands that avoiding boredom will be one of the principal challenges of long life.

It is the principal political challenge of Central Asia now.

These are two of the principal challenges for the Lisbon Summit.