radioactive tracer
(physics, chemistry, medicine) A radioactive isotope which, when injected into a chemically similar substance, or artificially attached to a biological or physical system, can be traced by radiation detection devices.
Sexual exploration; experimentation in sexuality.
(medicine) The failure of a mother (human or otherwise) to produce sufficient milk following birth.
plural of Capshaw
研究チームは放射性トレーサーを用いて、河川系における汚染物質の流れを追跡した。
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