Sentence examples for challenge is when from inspiring English sources

"The challenge is when melanoma develops it can be completely without any symptoms".

The challenge is when there's a conflict between different local entities or a national and local perspective.

But, of course, the real appeal of the team challenge is when mismatched contestants, preferably ones who have already been feuding, are forced to work together.

"The challenge is when you have multiple interests and multiple objectives and competing priorities, who wins and what's the balance of power?" he said.

The challenge is when it's different systems and people can't see that it's done.

Melia (double participant, model E): I think the biggest challenge is when it's time to rotate you have to rotate.

She said the greater challenge was when a friend making the request wants to know why the idea was rejected.

The only time Nottinghamshire looked even remotely like making a fist of their challenge was when Shafayat and Patel put on 96 in mid-innings.

The biggest challenge was when I first started I was the only female.

It assumes companies already know what their challenges are, when in fact they often do not.

The higher I climbed, the nastier and more vicious the challenges were when they came.