但对于多时间尺度的电力系统模型降阶问题而言，还必须研究快流形的存在性及其基本特征，以给出固定系统慢动态的降阶条件。
But for a multi time scale power system, existence and fundamental characteristics of fast manifolds must also be studied in order to obtain the model reduction condition of fixing slow dynamics.
最后指出在琉球群岛以东、以南海域，经常出现各种不同的中尺度反气旋式和气旋式涡，讨论了它们在时间与空间尺度上变化的特征。
In the regions east and south of the Ryukyu Islands, there are some mesoscale cyclonic and anticyclonic eddies with different scales, and the variability of their character is also reviewed.
年降水量与夏季降水量在时间尺度和周期特征方面非常相似。
The annual precipitation and summer precipitation are very similar in terms of time scales and cycle characteristics.
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