Above mentioned strategies bring the nonlinear degree of optimization model higher, so it can solve the optimization model with increased difficulties.

上述策略带来的优化模型的非线性程度较高的，所以它可以解决的优化模型增加了困难。

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Two major reasons contribute to this change of attitude, namely, altered perceptions of the destination, and the increased difficulties of doing business.

原因主要有两点：目的地感知的改变和经营困难的增多。

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However, upgraded competition among media operators, noisy communication environment, increased difficulties of effect evaluation and so on as side effects are coming with the flourish.

然而与之相伴的是媒介经营者的竞争升级，广告传播环境的嘈杂，广告效果评估的难度日增。

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At that meeting I offered increased resources to meet any difficulties.

BBC: Sam Galbraith's exam statement in full

Severn Trent said the difficulties were entirely down to the cold weather, which caused increased leakages during the winter.

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Democratic Gov. Howard Dean of Vermont noted that these increased costs are hitting states at a time when many are having budget difficulties because of the slowing economy.

CNN: Governors want more homeland security money