应用大气降水中的氚做示踪核素来研究地下水的运动状态，必然遇到氚的输入背景值问题。
In the study of groundwater movement using tritium in atmospheric precipitation as tracer, we will inevitably encounter the input background value problem of tritium.
现场示踪试验和环境模拟实验是核素在地质介质迁移研究中常用的两种方法。
Field tracer migration test and laboratory simulation test are two commonly used methods to study radionuclide migration in geological media.
作者用4种稳定性核素标记的支链氨基酸和芳香氨基酸对正常人与重型病毒性肝炎（重型肝炎）患者进行示踪动力学的研究。
The metabolic kinetics of branched chain amino acids (BCAA) and aromatic amino acids (AAA) in normal subjects and patients with severe viral hepatitis as studied with 4 stable isotope labeled tracers.
放射性核素示踪法是土壤侵蚀研究的一种重要方法。
It is an important method to investigate soil erosion that using radionuclides tracks down.
本文介绍一种利用核素示踪技术研究黄土高原不同地形部位土壤侵蚀量的监测新方法。
A new method with nuclear technology to study soil erosion amount monitoring on different topography part in Loess Plateau is reported in this paper.
采用生物活性染料- 放射性核素联合示踪法、病理连续切片及免疫组化染色可提高前哨淋巴结活检的检出率及准确性。
Combined techniques and pathologic ultrastaging may increase the identification rate and decrease the false negative rate in patients with SLNB.
目前文献报道的前哨淋巴结识别方法较多，主要包括：染料示踪法、核素示踪法及联合示踪法。
Some techniques have been reported to identify sentinel lymph node(SLN), most of them may include utilization of an isosulfan blue dye, a radiocolloid tracer, or a combination of both.
对稳定性稀土元素和几种核素复合示踪土壤侵蚀与泥沙来源研究的国内外研究进展，进行了总结和评价。
The studies of those that stable rare earth elements trace soil erosion process and several nuclides are compounded together to distinguish source of sediment are also summarized and evaluated.
对稳定性稀土元素和几种核素复合示踪土壤侵蚀与泥沙来源研究的国内外研究进展，进行了总结和评价。
The studies of those that stable rare earth elements trace soil erosion process and several nuclides are compounded together to distinguish source of sediment are also summarized and evaluated.
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