He says even getting these children to say their names can be a challenge.
For companies looking for the exits, being heard above the cacophony can be a challenge.
Of course, getting into a vendor tent Saturday afternoon is proving to be a challenge.
That would be a challenge to the authority of the Church's central bureaucracy, the Curia.
When he does leave, filling his big shoes would be a challenge for any president.
We knew it was going to be a challenge but we just didn't respond.
This seems to be a challenge that cannot be solved by throwing money at it.
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"The expedition is supposed to be a challenge - not a survival exercise, " he said.
Growing a notable following, especially in the scintillating world of enterprise tech, can be a challenge.
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It could be a challenge for The Lorax to live up to its profitable predecessor.
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Moral rationalization, especially in the face of overwhelming evidence of guilt, can be a challenge for consumers.
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For an organization with that kind of longevity, staying ahead of our sector can be a challenge.
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That may be possible when managing several hundred devices, but thousands will most certainly be a challenge.
Others say that navigating potential pitfalls, like protecting intellectual property, can also be a challenge in China.
But it will also be a challenge to satisfy the expectations of a football-mad nation, he says.
Trying to explain subtleties in relation to making a marketing campaign work locally can be a challenge.
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These statistics can be spot-on or misleading, and figuring out which they are can be a challenge.
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Making Call of Duty a big name in the world of e-sports might be a challenge, however.
But being heard in a city dominated by entrenched interests and established industries will be a challenge.
Averaging 33% over a long period time (versus something short, like a week) would still be a challenge.
"The cola category continues to be a challenge, " CEO Indra Nooyi noted in a conference call with investors.
Because of the vast amount of personal information companies will hold on individuals, storage will be a challenge.
When travelling to a new country or even a new city, deciding how much cash to carry can be a challenge.
To some extent, cross-border cash management used to be a challenge for treasurers of multinationals doing business in China.
However, tearing down all these walls can be a challenge to baby boomers.
It's definitely going to be a challenge, but we'll be prepared for it.
Senator MARTINEZ: I think that's going to be a challenge, but we've got to be equal to the challenge.
This would be a challenge with debate number three focused on foreign policy.
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But I think the economy continues to be a challenge, but interest in gaming is at an all-time high.
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But eating while trying to browse Facebook in an attempt to distract from your loneliness can be a challenge.
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