现有的沉降速率法主要依据地方经验沉降速率标准，无法与获得的工后沉降相联系。
Post-construction settlements controlled by empirical settlement rate standards used in some highways can not be obtained.
p 90的仪表指示数与标准的平均速率越接近，这个站点对投资者吸引力越大。
The closer the P90 reading is to the measured average speed, the more attractive the site becomes to investors.
由于不同的同位素有不同的衰变速率，每种方法都不会拘泥于标准数值。
Because different isotopes decay at different rates, each method provided a slightly different measuring stick.
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