以下为句子列表：
英文: Abstract: The paper mainly introduces how to optimize the existed filtration method with statistics normal distribution and quadrature optimization,which make the optimized filtration method economic 、 time saving and effective.
中文: 摘要：主要介绍了如何利用正态分布和正态优化对现有的筛选方法进行优化，从而使优化后的筛选方法在达到预期筛选目的的情况下做到最经济，省时和有效。
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英文: And it is indicated that the corrosion residual life of the pressure vessel and pipeline shouldn't be calculated with normal distribution model since the coefficients of variation of maximal corrosion depth and corrosion rate are often more than 0.2.
中文: 最后指出最大腐蚀深度和腐蚀速率等参数的变异系数往往大于0.2，因此不宜用正态分布模型进行压力容器与管道耐腐蚀剩余寿命的计算与分析。
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英文: Considering demand during lead time with mixtures of normal distribution and variable lead time, the integrated optimization model for a supply chain consisted with a buyer and a supplier is developed, and the corresponding algorithm is developed to find
中文: 摘要考虑提前期内需求服从混合正态分布且提前期为可变情形下，建立由购买商和供应商所组成的简单供应链的集成优化模型，并设计相应的算法对模型进行求解。
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英文: Fluorine is an important trace element closely related to health, and some diseases in living organisms may arise from the abnormal distribution of fluorine in the environment.
中文: 摘要氟是一种重要的微量生命元素，环境中氟过量或缺乏都会导致机体产生疾病。
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英文: In accordance with the damage data of gas pipelines collected in the Chi-Chi earthquake, the study assumes that the empirical fragility curves can be expressed in the form of two-parameter normal distribution functions.
中文: 文中配合集集地震时天然气管线的灾损资料，假设易损曲线为一个具两参数的常态分布函数。
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