For vertical strike-slip faults, the rupture directivity effect causes as strong spatial variation in ground motions for a given closest distance to the fault.

对于垂直走滑断层，在给定的距断层最近的范围内，破裂方向效应使地震动产生强烈的空间变化。

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Deposing EM38 horizontally at different heights above the ground, the variation of EM readings has a relation to the salt contents in different depths of soil layer.

将EM 38水平放置在地表以上不同高度，仪器e M读数随高度的变化与不同深度土层的盐分含量分布有关。

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This modification incorporates explicitly the duration of strong earthquake ground motion into the time dependent variation of the root-mean-square peak amplitude.

这个修正明显地将强震运动的持续时间包含在均方根振幅依赖于时间的变异中。

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More recently, many states have begun offering a sort of middle ground: A variation on the traditional design -- professional sports team logos, calls to nature conservation, celebrations of the arts, etc.

BBC: Flags on car plates - right or wrong?

Selection can shift a population from life in the trees to life on the ground by tiny steps but only if the right kind of variation is available.

ECONOMIST: A master of evolution takes a last long look at Darwin