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: Abstract: That the prevention measures are not enough at the prop-drawing operation in the stope is analysed at this paper,and the structure and the site application effect of DTH push-protecter are introduced.
中文: 文摘:分析了回采工作面回柱放顶作业中防护措施的不足，介绍了DTH推护器的结构和现场应用效果。
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