More reasonable long-term or short-term forecasting is to be made from trend analysis and the trend analysis provides the effective foundation for science decision;

通过趋势分析，可以制定出比较合理的长期或短期预测，从而为科学决策提供有效的依据；

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The seasonal trend analysis derived from over 30 years of data reveals that a low typically forms in July.

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Maket and trend analysis of each mentioned OS, where there are headed from a developmental point of view.

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