It is an irreversible process and a dissipated structure with space-time match for petroleum migration and accumulation.

油气运聚是一个不可逆过程，也是一个时空有序的耗散结构。

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Due to the wire width and the space between wires on PWB becoming finer the insulating capability of PWB is affected by ionic migration, that was not paid enough attention to for a long time.

由于印刷线路板的线宽和线间间隔的细微化，以往不引人注意的离子迁移现象已经对线路板的绝缘性能造成影响。

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The earthquakes simulated by the model on the Sumatra subduction zone have characteristics of quasi-cycle in time and migration in space. The earthquake ruptures propagate upward from bottom.

模拟的苏门答腊俯冲带上的大地震在时间上有准周期性，空间上有迁移特征，破裂由深部向浅部进行；

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