He was sweating more and more and his servants would by now be bringing him fresh shirts several times a day.

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Mobile phone makers worldwide have had trouble with a market that is moving from fresh users to upgrades of existing subscribers' phones, and have also suffered as operators concentrate more on sweating more money out of existing customers than on signing up new ones.

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Anybody who has spent more than a minute sweating over their online social networks needs an answer to this question.

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Behind most of Mr Steinbruch's deals lies the idea that privatisation in Latin America represents a unique opportunity to control assets that would otherwise take generations to assemble, and that private managers will be far more successful than the state at sweating those assets for profit.

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"Sweating super-hydrates the skin and makes athletes more likely to develop blisters, " Adams says.

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When you take into consideration their recommendation to re-apply every two hours (or more if you've been swimming or sweating) sample sizes just won't suffice.

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