以下为句子列表：
英文: A radioactive isotope of carbon, especially carbon14.
中文: 放射性碳碳的一种放射性同位素，尤指碳14
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英文: A radioactive, inert, gaseous isotope of radon, with a half-life of3.92 seconds.
中文: 锕射气氡的一种放射性的，惰性的和气态的同位素，其半衰期为3。92秒
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英文: A team led by Stanford University scientists reconstructed dietary sources of recent and ancient condors by measuring carbon and nitrogen isotope concentrations in feather and bone remains.
中文: 由史丹佛大学科学家所率领的小组，测量了秃鹰遗骸的羽毛及骨骼中，碳及氮同位素的浓度，而重建了古今秃鹰的食物来源。
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英文: Abstract: Described in the paper is the result of Tianjin Steel Tube Corporation's applying the latest on-line gauging system i.e.the steel tube isotope thermal gauging system to the MPM line,involving details of several typical thermal gauging curves.
中文: 文摘:介绍了天津钢管公司在其MPM连轧管机组上应用新一代在线测厚系统——钢管同位素热测壁厚仪的成果，并较为详细地介绍了几个典型的热测壁厚曲线图。
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英文: According to the comparison and analysis of mineral composition and geochemical characteristics of trace element, sulfur isotope, hydrogen and oxygen isotope, lead isotope and rare earth element in the gold ore and the altered spilite from the deposits of
中文: 摘要通过对铧厂沟金矿床金矿石和蚀变细碧岩矿物组成、微量元素、硫同位素、氢氧同位素、铅同位素及稀土元素地球化学特征地对比分析，得出金矿石对该基性火山岩存在明显的继承性。
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