However, the situation in Cité Soleil remains challenging.

Yet a dispassionate assessment of nuclear energy s place in the world remains as necessary as it is challenging.

The parameterization of these processes in chemical transport models remains challenging. In addition, these processes are occurring in a continually changing atmosphere.

Tremendously challenging.

That was challenging.

Why so challenging?

My visit confirmed my earlier assessment that Lebanon remains committed to moving ahead with a challenging and important programme of political and socio economic reform.

You know the uni is the most challenging, so number ten is challenging.

Challenging gender based violence

Not a challenging task.

There is some evidence, however, that the extent and impact of economic and financial crimes are increasing, although drawing conclusive arguments in this regard remains challenging.

And this is a very challenging idea. It's a very challenging idea to mainstream media.

A bit more challenging, right?

So this is more challenging

Are you challenging my orders?

A bit more challenging, right? (Laughter)

It's not very challenging any more.

And that's challenging because it's easy.

Your job needs to be challenging.

This is challenging work to do.

Something is very challenging to me.

Despite the positive developments of the last few weeks, the political military situation remains fragile and the task before the new Government can be expected to be difficult and challenging.

But striking the proper balance is challenging.

That will be particularly challenging for Bernanke.

That is an assumption that needs challenging.

Emerging and challenging issues deriving from implementation

DM She's very tough it's most challenging.

Skepticism, because you must always be challenging.

I'm challenging you to find you value

And people reinventing themselves in challenging times.

It's this immensely exciting and challenging problem.

Listen, I'll teach you a challenging trick.

They are challenging forces they cannot control.

Miss Templeton, please stop challenging your witness.

Finally, Japan s external environment today is more challenging.

This session will undoubtedly be a challenging one.

It would be a challenging and difficult task.

In Japan, they say that sushi is challenging.

But that makes an interpreter's job very challenging.

This task proved more challenging than I hoped.

The societal one is a lot more challenging.

I'm challenging your all to go conference(library)

Transporting wave generated electricity inland would be challenging.

BC EDL is this immense, technically challenging problem.

Targeting these vulnerable populations in spite of challenging security problems remains a priority for the Humanitarian Assistance Division and the non governmental organizations, United Nations agencies and military forces with which it collaborates.