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| radiothor | |||
| radiotracer | |||
| 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 (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 indicator | |||
| radioindicator | |||
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| radioactive indicator | |||
| 放射性指示剂: 7 phrases in 5 subjects |
| Environment | 1 |
| General | 2 |
| Geophysics | 1 |
| Metallurgy | 2 |
| Technology | 1 |