以下为句子列表：
英文: To generate a forecast, a numerical weather prediction model repeatedly advances the model state from one instant through a small time step (a few seconds to a few minutes depending on the scales of motion resolved by the model).
中文: 在执行预报时，数值天气预报模式会从某一瞬间时刻以微小的时步，重复向前计算模式的状态（时步可由几秒到几分，视模式所解析的运动尺度而定）。
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