Because P and S waves travel at different but fairly constant speeds, the interval between their arrivals increases in proportion to the distance from the earthquake focus, or initial rupture point.
由于 P 波和 S 波以不同但相当恒定的速度传播，它们到达的间隔与到震源或初始破裂点的距离成比例地增加。
This type of fragmentation allows the DBA to define a set of initial fragments and an interval value.
这个类型的存储残片允许dba定义一系列的初始片段和一个区间值。
You can use them to schedule events that should occur at regular intervals after the initial run, with the period specifying the interval.
可以用它们对那些初次运行之后需要按照常规间隔发生的事件进行调度，使用周期参数指定时间间隔。
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