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| English | Chinese |
| radioactive tracer | 放射显迹物 |
| radioactive tracer A radioactive isotope which, when injected into a biological or physical system, can be traced by radiation detection devices, permitting determination of the distribution or location of the substance to which it is attached | 放射性指示剂 (一种放射性同位素，当把它注入到生物或物理系统时，能被辐射检测设备追踪，并能检测到它的分布情况或位置。) |
| radioactive tracer | 同位素〔放射性〕示踪物 |
| radioactive tracer technique | 放射性指示剂技术 |
| tracer compound | 示踪〔含同位素指示剂的〕化合物 |
| tracer element | 同位素指示剂 |
| tracer element | 显迹原子 |
| tracer element | 示踪〔痕量〕元素 |
| tracer element | 示踪〔显迹〕原子 |
| tracer of pollution | 污染示踪剂 |