科学家通过广泛使用的调查问卷方式，测量了具有代表性的年龄超过65岁的1766个人血液中的维生素d的含量。
Scientists measured blood levels of the vitamin in a representative sample of 1, 766 people over 65 and assessed their mental functioning with a widely used questionnaire.
然而，设法测量灾难对人们健康的影响的一个难题是研究不能有代表性的提供幸存者以往健康状况的信息。
However, a problem in trying to measure the impact of disasters on people's health is that studies typically have no information on what survivors' health was like before the experience.
目的通过对成都某几个氡气观测实验室以及代表性建筑物的氡浓度测量，分析氡浓度的时间变化特点和垂直变化特点。
Objective To analyze the temporal and spatial variations of radon concentration by measuring in some LABS and typical buildings in Chengdu.
为了达到95％的代表性概率，需要测量900名儿童。
The sample size needed to obtain 95 percent probability is 900 children.
分析了子核具有三个激发态的典型核衰变情况下的级联校正情况，具体给出了测量滤材源的情况下具有代表性的符合校正因子计算的解析表达式。
The true coincidence correction for a specific three excited levels de-excitation case has been analyzed, and the typical analytical expressions of true coincidence correction factors have been given.
为了建立东北电网负荷模型参数库，须选择有代表性的负荷节点布设负荷特性测量装置。
In order to build the load model database of Northeast power network, it should select the representative load nodes to install the load measurement units.
本文根据有代表性的准则函数推演出大地测量反演参数可辨识条件，给出其适用范围；
In this paper, the identifiable conditions are derived from the representative criterion function and their application scope is given.
介绍了几种具有代表性的纳米粒子检测方法，就其应用领域和测量范围比较各自的优缺点。
Several typical measurement methods on nanoparticle are introduced. Comparison among these methods is made according to their application areas and applicable particle size range.
这样，系统保证以声速估算的气温测量才是真实且具代表性的。
In this way, the system ensures that the air temperature measurement used in the speed of sound calculation is truly representative.
这样，系统保证以声速估算的气温测量才是真实且具代表性的。
In this way, the system ensures that the air temperature measurement used in the speed of sound calculation is truly representative.
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