1. Cache incoherency means that the cache is unaware that the DMA controller has placed new words in memory.
   这意味著缓存区无法辨别DMA控制器是否将新数据写入内存。
2. The spatial variation of seismic ground motions is produced primaryly by the three factors of geometric incoherency effect,wave-passage effect, and local site effect.
   导致地震动空间变异性的原因主要在于:几何不相关性效应、行波效应、局部场地条件效应。

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