以下为句子列表：
英文: A review with 11 references is given on the establishing principle and method of normal reference value of elements in human hair and blood including the definition, determination, expression, transference, and significance of reference value.
中文: 摘要从参考值的定义、确定、表述、移植，及其意义等五个方面介绍了人体头发和血液微量元素正常参考值的确定原则及方法，重点介绍了可供实际操作的测定值统计法（复杂统计处理法）和文献值移植法（近似参数处理法）。
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英文: Abstract: Discusses the principle and method of drawing in model space and paper space,analyses their characteristic,shows clearly the difference between the two and their application scope.
中文: 文摘:讨论了模型空间与图纸空间中绘图的原理、方法，分析了它们各自的特点，指出了它们各自的适应场合，可供不同的绘图采用。
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英文: Abstract: The paper analyzed the properties of concentric curve, theprinciple and method of setting out stakes of middle-line &sidings on one random station and closed with main points.
中文: 文摘:分析了同心曲线的性质，提出了可在任意点设站测设同心曲线的原理及放样同心曲线的中线、侧线各桩并闭合于各自主点的方法.
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英文: Abstract: The paper say the principle and method of standard quantum insertion method used in the precision turn control of the machine arm, issue the method correctness and capability, and give the structure of standard quantum generator and interface me
中文: 文摘:本文叙述了标准量插入法应用于机械臂精密转动控制的原理和方法，探讨了该方法在实现上的技术可行性，给出角度标准量发生器的结构和定位信号的接口方法。
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英文: Abstract: This paper presents the principle and method for measuring various microwave devices' return loss by spectrum analyzer and analyses the uncertainty of measurement.
中文: 文摘:介绍了频谱分析仪测量各种微波器件回波损耗的原理和方法，并对测量结果的不确定度进行了分析。
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