以下为句子列表：
英文: Abstract: In this paper,geology of ore deposits,techni c al conditions,mining methods and blasting parameters of in-situ leaching uraniu m after blasting for an outcrop ore body are introduced.
中文: 文摘:介绍了某铀矿体原地爆破浸出的矿床地质，技术条件，采矿方法选择及爆破参数。
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英文: The use of different mining methods may cause some changes in gas emission, gas distribution rule and gas migration when the long-wall top coal caving (LTCC) is used for the high gas content coal seam, leading to a hidden danger of safety production.
中文: 摘要在综采放顶煤开采高瓦斯煤层时，由于采用的开采方法不同，会带来瓦斯涌出与分布及运移规律的一系列变化，给煤矿的安全生产造成极大的事故隐患，因此必须对此进行深入的研究。
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英文: We discuss how to use data mining methods to analyze historical customer data in direct mail marketing and to improve marketing efficiency.
中文: 摘要我们将讨论在直邮营销行业中如何使用数据挖掘方法分析客户历史数据，提高营销的效率。
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英文: and at different ratios of tailings/crushed stones/cement, the compression strength of 8 day-curing cycle varied between .0～ . MPa, which could meet the requirements of various mining methods at the mine.
中文: 在尾砂,碎石与水泥不同配比条件下,8d抗压强度在.0～.MPa之间,可满足不同采矿方法的要求。
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