Due to limited observational data, the vortex fields in a global numeric al model are often too weak.

由于观测资料的缺乏，全球数值模式中台风涡旋一般较弱。

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Thus reinforced, its operations against al Qaeda would become a model that Petraeus would cite, as the brigade pushed into the areas where al Qaeda fighters and their allies had found sanctuary.

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The other is the Bill Clinton model: pick someone, Al Gore, who reinforces your message - new, young, different.

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The model used by Professor Nutt et al. only looks at harm, and it weighs the harm of alcohol to others more than it does to oneself.

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