For example, if it is sunny and 87 degree today, the persistence method predicts that ia will be sunny and 87 degree tomorrow.

持续性方法假设在天气预报时，条件是不会发生变化的。例如，如果今天是晴，87度，持续性方法会预测明天也会是晴，87度。

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For example, if it is sunny and 87 degree today, the persistence method predicts that it will be sunny and 87 degree tomorrow.

例如，如果今天是晴，87度，持续性方法会预测明天也会是晴，87度。

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However, if weather conditions change significantly from day to day, the persistence method usually breaks down and is not best forecasting method to use.

然而，如果天气状况一天天地显著变化，持续性方法常会出错，所以这不是制作天气预报的最佳方法。

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The lack of performance persistence in actively managed funds makes this a poor method of selection.

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