《英文msh词典》Tracers,Radioactive
[入口词] Tracers,Radioactive
[主题词] Radioactive Tracers
[英文释义] Radioactive substances added in minute amounts to the reacting elements or compounds in a chemical process and traced through the process by appropriate detection methods,e.g.,Geiger counter. Compounds containing tracers are often said to be tagged or labeled. (Hawley's Condensed Chemical Dictionary,12th ed)