在病例对照研究中，是否可用暴露比值比(EOR)作为CIR或IDR的无偏估计，取决于抽样方法和疾病率高低。
It depends upon the sampling methods and the size of the disease rate whether exposure odds ratio (EOR) in case-control studies can be used to estimate the CIR or IDR.
方法采用透射比浊度法测定68例不同性质胸腔积液患者的胸水CRP和血清crp水平，以及其比值。
Methods CRP levels of pleural fluids and serums in 68 patients with different types of pleural effusions were detected by nephelometer and the ratios of pleural fluids to serums were also obtained.
将与曲线拐点切线和最大值水平直线交点相对应的长径比值定义为纤维临界长径比，将与此相对应的函数值定义为弹性模量临界值。
The critical aspect ratio of the fiber is defined as the crosspoint of the tangent value of the inflexion and the asymptote of the maximum elastic modulus.
土体在动力荷载作用下，当动荷载与土体静强度的比值即循环应力比超过某一临界循环应力比时，土体才会发生累积变形和强度弱化。
The cycle stress ratio is the ratio of dynamic strength and soil static strength, as it passes the critical cycle stress ratio, accumulated deformation takes on and soil strength declines.
土体在动力荷载作用下，当动荷载与土体静强度的比值即循环应力比超过某一临界循环应力比时，土体才会发生累积变形和强度弱化。
The cycle stress ratio is the ratio of dynamic strength and soil static strength, as it passes the critical cycle stress ratio, accumulated deformation takes on and soil strength declines.
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