孔隙速度是示踪元素穿过孔隙介质的速度。
The pore velocity is the velocity with which a tracer moves through a porous medium.
美国马里兰，巴尔的摩人体暴露PM 2.5和示踪元素。
Personal exposures to PM2.5 mass and trace elements in Baltimore, MD, USA.
结果表明，精炼过程和钙处理后的钢中显微夹杂物均含有钢包渣示踪元素镧；
Results show that the microinclusions in steel both in the refining process and after calcium treatment include La which is the tracer in ladle slag.
结果表明，精炼过程和钙处理后的钢中显微夹杂物均含有钢包渣示踪元素镧；中间包钢样中的显微夹杂物同时含有镧和中间包示踪元素铈；
Results show that the micro-inclusions in steel both in the refining process and after calcium treatment include La which is the tracer in ladle slag.
并且，由于铜是主要成矿元素之一，所以铜同位素对于成矿物质来源和成矿过程的示踪更为直接。
Moreover, as one of major ore-forming elements, copper isotope composition can directly trace ore-metal source and ore-forming process.
根据元素示踪法，首次估算出北京地区矿物气溶胶中本地源与外来源的相对贡献量。
Based on the elemental tracer technique, we first estimated the relative contributions of sources to the total mineral aerosols from inside and outside Beijing.
稀土元素(REE)在揭示沉积环境，研究沉积物物源及成因方面具有重要的示踪意义。
Rare earth elements (REE) have important tracing significance on studies about sedimentation environment, source and forming of sediments.
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.
所谓同位素构成，是指在某一元素的特定样品中该元素不同同位素的百分比率。同位素构成因此特别适合于作为铜矿厂来源的示踪物。
Isotopic composition, the percentages of the different isotopes of an element in a given sample of the element, is therefore particularly suitable as an indicator of the sources of the ore.
在人工示踪法中叙述了中子活化示踪沙技术和稀土元素- DTPA螯合物示踪法。
In the paragraph of the method of using artificial tracer, there is the explanation about the tracer technology of neutron activation analysis and the method of Lanthanide-DTPA tracer.
在人工示踪法中叙述了中子活化示踪沙技术和稀土元素- DTPA螯合物示踪法。
In the paragraph of the method of using artificial tracer, there is the explanation about the tracer technology of neutron activation analysis and the method of Lanthanide-DTPA tracer.
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