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quaternary
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a. 四个一组的, 四元的, 四价的, 季的；
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详细解释：
a. 四个一组的, 四元的, 四价的, 季的\n【计】 四进制的, 四元的\n【化】 四元的; 四价的; 季的; 连上四个碳原子的; 四取代的\n【医】 四元的, 四价的, 季的
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以下为句子列表：
英文: Based on the analysis of the late Cenozoic stratigraphy, neotectonic topography and the structures of Quaternary in the region, the present paper studies the neotectonic characteristics of the region systematically.
中文: 通过对晚新生代地层、新构造地貌及第四系内褶皱和断层的综合分析，阐述了区内新构造活动特征。
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英文: Based on the characteristics of the Quaternary tectonic activities of Babaoshan-Huangzhuang-Gaoliying fault and the regional principal compressional stress direction and regional tectonic activities derived from the recent cross-fault displacement observa
中文: 摘要根据八宝山－黄庄－高丽营断裂第四纪地质构造活动特徵和利用首都圈地区跨断层位移最新的观测资料求得的北京地区区域主压应力方向和区域构造活动特徵，分析了八宝山－黄庄－高丽营断裂上7处跨断层位移测点的断层活动与地震活动的关系，得出了首都圈及邻近地区即将进入下一个地震活跃期的结论。
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英文: Epoxy resin/montmorillonite clay nanocomposite was prepared by intercalating with epoxy and organic montmorillonite clay, which was modified with the long chain quaternary ammonium salts with two positive ions in a molecule as the organic processing reage
中文: 摘要采用双子季铵盐对蒙脱土进行有机化处理，再与环氧树脂进行插层复合制备了环氧树脂／蒙脱土复合材料。
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英文: Holocene(Recent) The present epoch in the geological time scale, being the second epoch of the Quaternary period, dating from the end of the last glaciation, about 10000 years ago, to the present day.
中文: 全新世：在地质学上指第四纪的第二阶段的整个时期，它终止于最后一个冰川期，距今大约10000年。
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英文: However according to analyzing the history of loess in the Quaternary Period and records about rain dustin ancient literature, it can be found that sand-dust storm often happened in ancient time, even more acute than today.
中文: 通过分析第四纪黄土生成历史，以及古文献中的大量关于“雨土”的记录，可以发现其实沙尘暴古已有之，古代沙尘暴活动剧烈程度较今日有过之而无不及。
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