为了研究上新世的飓风活动情况，研究人员依靠的就代理海洋温度，这个温度是基于洋底岩芯里几种化学示踪剂变化引起的。
To investigate the hurricane activity of the Pliocene, the researchers relied on proxy ocean temperatures based on variations in several chemical tracers in drill cores of the ocean floor.
放射性同位素以各种化学形态作为示踪剂的应用为医学提供了强有力的诊断工具。
In medicine, the use of radioisotopes in various chemical forms for tracing purposes offers a powerful diagnostic tool.
稀土元素在环境中的分布分异机制，是研究其作为地球化学示踪剂的重要基础和必要前提。
The distribution and fractionation of Rare Earth element are the base for their usage as trace elements.
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