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。
The interval duration of mastication of linear occlusal dentures was shorter than that of anatomic occlusal dentures in the mastication movement cycle( P< 0.05 ).
在咀嚼运动循环中，线性总义齿咀嚼周期的间歇期短于解剖式总义齿（P<0.05）。
The surface body electrocardiogram(ECG) manifestations of biatrial pacing are that P wave duration shortens, the polarity of P wave changes to negative, PR interval gets shorter correspondingly.
双房同步起搏体表心电图表现为P波时限短、负向或正负双向，PR间期相应缩短。
With the measured P and S wave velocities and log-derived densities of the same interval, rock mechanical parameters of this pre-borehole are roughly calculated.
提取出其中的纵波、横波速度信息，并与实验室岩心声波测量结果和测井结果进行了对比。
In monitor of the chief systems of experimental cattle, only bradycadia, mild imbalance of acid-base and prolonged P-R interval of ECG were found.
对实验牛心血管系统、呼吸系统，肝肾系统和血液指标监测，仅见心率减慢、轻度酸碱平衡紊乱以及ECG的P—R间期延长，其他指标均无明显变化。
Maximum burst interval (BImax) is significant longer in abnormal preterm EEGs than that in normal preterm EEGs. (P <0.001).
在脑电轻度和中重度异常的早产儿中，脑电1分钟高波幅段数均明显低于正常早产儿（P<0.001）；
Maximum burst interval (BImax) is significant longer in abnormal preterm EEGs than that in normal preterm EEGs. (P <0.001).
在脑电轻度和中重度异常的早产儿中，脑电1分钟高波幅段数均明显低于正常早产儿（P<0.001）；
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