以下为句子列表：
英文: In this paper, by means of macro-morphology inspection, chemical composition analysis, microstructure examiation, mechanical property testing and X-rays diffraction analysis, the fractured bolt and random sample bolt were analyzed.
中文: 摘要采用断口宏观形貌观察、化学成分分析、显微组织检验、力学性能则试及腐蚀产物的X射线衍射分析等手段，对断裂与部分抽检的卡瓦螺栓进行了综合试验分析。
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英文: The paper analyses the survey data about stratified random sample of 70 villages in Shandong Province by qualitatively and quantitatively.
中文: 摘要20世纪90年代以来，中国农业生产结构发生了巨大的变化，但人们对农户种植结构调整的主要影响因素有显著的不同看法。
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英文: The survey data were collected from a random sample of 496 ninth grade students in 15 probability proportionate multistage cluster classes in Taichung City and County, Taiwan in 2005.
中文: 本研究资料得自2005年台中县市的496位依县市接近等比例、乡镇市区及学校不重复原则的15个接近等比例、丛集随机班级样本。
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英文: This formula used inverse regression and data fusion technical and maximum likelihood theory, then this method enabled random sample value obtained in ultrasonic and rebound method of different detection population to mix together effectively, and reach e
中文: 该公式利用逆回归理论、数据融合技术和最大似然原理，将回弹值和声速值分别看作被解释变量，将来自超声法和回弹法不同量纲的检测数据进行有效融合，得出混凝土强度的推定值，该推定结果具有无偏性和方差最小性质。
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英文: This paper studies the typical two-unit series maintained system, the distributing of the units life have been known. by random sample to the life of units and simulate with computer, uses Monte-Carlo method, counts the failure time of every unit, and fai
中文: 摘要研究了典型的两元件串联的可修系统，在已知元件的寿命分布的条件下，应用蒙特卡罗方法，对元件的寿命进行随机抽样并进行计算机模拟，通过统计每个元件故障的次数，得出了两元件串联可维修系统的可靠性特征量－故障率，并绘出了曲线。
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