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

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

Unfortunately, it also indicates how ambitious and challenging a task it is to reform the international monetary order.

But striking the proper balance is challenging.

That is an assumption that needs challenging.

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

Finally, Japan s external environment today is more challenging.

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

Opposition leaders do not like the subject, but they avoid challenging it.

It will be challenging, but maybe also healthy for our common future.

This category is especially useful for solving especially challenging problems.

In short, when it comes to a Sino Russian alliance challenging the West, history is not likely to repeat itself.

Because it is fighting for its own survival in a highly challenging environment, the Jordanian regime needs Israel s security collaboration.

The Perpetuity Growth Model has several inherent characteristics that make it intellectually challenging.

In 2004, UNHCR maintained financial stability, although it was another challenging financial year.

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

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

But, following monetary easing and fiscal expansion, it is Abenomics third arrow that will prove most important and most politically challenging.

It is one of the most challenging race tracks in the world, mainly due to its fast, hilly and twisty nature.

But the science and engineering of HDR has been challenging, and it is only now that the first power stations are emerging.

A bit more challenging, right?

But mobilizing civil society is hugely challenging, particularly when, as in Iraq, it needs to be done quickly and on a large scale.

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

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)

If the United Nations is to tackle the ever more numerous and challenging tasks entrusted to it by Member States, it is essential that the Organization have a strong and dependable financial base.

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.

That will be particularly challenging for Bernanke.

Emerging and challenging issues deriving from implementation

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

The route crosses major earthquake zones, and is subjected to extreme temperatures of cold and heat and inhospitable terrain, making it an extremely challenging engineering project.

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

However, the situation in Cité Soleil remains challenging.

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

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

Indians have generally felt free to be themselves, within their dynamic and diverse society. It is that freedom that the BJP s representatives and followers are challenging today.

Even harder to gauge was what it would take for the disaffected to say enough is enough and begin challenging their regime openly, defiantly, and in concert.

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.

Moments like these are especially challenging for foreign policymakers, who must keep one eye on the world as it is and the other on the world as it might be in the future.

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

Coordination and cooperation will be needed even more in the challenging transition period once disengagement is complete.

Two serious problems make reconciliation in Afghanistan particularly challenging.

But success in Cairo might prove even more challenging.

This means that Europe probably faces another challenging year.

The selection of indicators has proven to be challenging.