This category is especially useful for solving especially challenging problems.

This dollar invasion is making macroeconomic management in emerging countries even more challenging than usual.

This means that Europe probably faces another challenging year.

None of this is meant to deny that we are living in challenging and uncertain times.

In this challenging environment, administrative infrastructures have continued to function.

This has been particularly challenging in remote and insecure areas.

But striking the proper balance is challenging.

That is an assumption that needs challenging.

So this gets a little challenging because the dynamics of this robot are quite complicated.

Finally, Japan s external environment today is more challenging.

So this is more challenging large organ, vascular, a lot of blood vessel supply, a lot of cells present.

So, in a sense, the 18 minutes is challenging me to say, In life, this is what's important in terms of compassion.

At this sensitive political juncture, this is particularly relevant to the Iraqi security forces that are often required to operate in challenging and provocative circumstances.

And this is a very challenging idea. It's a very challenging idea to mainstream media. It's a very challenging idea to anyone who has invested an enormous amount of time and expertise, and who has a lot of energy invested in the notion that he or she knows better than everyone else.

As an unnamed Chinese source told Reuters, this is a challenging situation for anyone, given the action taken by the government.

The deployment and use of this seismic network is considered one of the most challenging aspects of the Don Quijote mission.

One hopes that Carney will follow this trend of challenging conventional wisdom at the BoE.

America, however, is not alone in challenging Al Jazeera head on.

Aside from clarity, it is important that group goals be challenging.

Determining an optimal level of accountability for results is also challenging.

In light of the problem, an online campaign launched earlier this year is challenging real men to show their solidarity against domestic violence.

In this regard, I encourage the international community to provide the support required for them to accomplish this challenging task.

A bit more challenging, right?

OK This is another aspect where, in my opinion, Ukraine has to deal with extremely challenging reality of armed conflict without even using proper names to define this reality.

How can we adapt to such a world? What underpins success in this new and challenging environment?

In the context of this extremely challenging environment, the main tasks of the military component would be

In fact, it is a challenging concept for both developed and developing countries.

Collating, presenting and marketing tourism information is a challenging task for developing countries.

UNHCR is working in this challenging context to preserve access to asylum for those who seek it based on a well founded fear of persecution.

Some local journalists and civil society groups are challenging the credibility of some of the results, and the CPC is challenging the outcome of the presidential vote at the INEC.

A bit more challenging, right? (Laughter)

We recognize that this will be a challenging five month period, and we pledge our support and complete participation.

That will be particularly challenging for Bernanke.

Emerging and challenging issues deriving from implementation

So, one of the reasons it's so challenging to prepare for this Y2K problem is, I want to argue, we have what I would call mainframe poisoning.

We need to make sure that they also show us things that are uncomfortable or challenging or important this is what TED does other points of view.

In consequence of this, social and economic development is increasingly challenging for a developing nation shouldering a debt burden out of all proportion to our economic capacities.

This process is particularly challenging for the prosecution, which has several hundred thousands of pages of investigative material in addition to thousands of pages of court documents.

The lawyer appealed against this decision, but this appeal was not heard, since the motion challenging the report had been denied on procedural grounds.

The company is challenging the dominant Android in China and is also looking to expand into Western markets.

The consultations were both lengthy and challenging this year, and we wish to thank all participants for their constructive contributions.

However, the situation in Cité Soleil remains challenging.

Taking pictures in the Gulf is challenging and even when trying to take pictures of women.

Determining when it is permissible to interfere with parental choices is challenging, given the deference that parents typically receive.

Vaccines protecting against Helicobacter pylori and hepC are in development (although the latter is proving particularly challenging).