But for any of us harbouring doubts about the need for nylon scaffolding around the knees, they present a difficulty as the warmer months - in theory - approach.

With the appetite these fish have, finding enough good food may present some difficulty.

The differences, however, do not present any difficulty in comprehension between speakers of these dialects, due to their close interaction.

While hedgehogs can swim and can get out of natural ponds, anything with vertical stone sides presents a difficulty.

The question of non-figurative imagery of divinity presents a difficulty.