Home/radiotracerradiotracer/rey-dee-oh-trey-ser/US // ˈreɪ di oʊˌtreɪ sər //放射性示踪剂,放射性核素,放射性抑制剂,辐射性示踪剂Definitionsn.名词 noun1 Chemistry.: a radioactive isotope used as a tracer. Level 4Browse all words →