常見例句雙語例句Technetium-99, a fission product of nuclear reactors that emits gamma rays, is the most-used tracer isotope in nuclear medicine.鎝-99是核反應(yīng)堆的裂變產(chǎn)物，是原子核醫(yī)學(xué)中最有用的同位素。chinafanyi.comThis paper presents a determination method of specific activity for uranium isotope in rocks, soil, water and thorium isotope in rocks using 232U as a tracer isotope.本文介紹了用（232U）作示蹤同位素，測(cè)定巖石、土壤、水體中鈾同位素及巖石中釷同位素比活度的方法。The combination of enriched stable isotope tracer studies and activation analysis techniques has become an ideal and reliable technique, especially in the fields of biology and medicine.濃集的穩(wěn)定同位素示蹤研究和活化分析技術(shù)相結(jié)合已成為一種理想可靠的技術(shù)，在生物醫(yī)學(xué)中更顯示出它的特色。權(quán)威例句The isotope, known as a medical tracer, is made outside the United States by a complicated process requiring highly enriched uranium from nuclear reactors.NEWYORKER: Fussbudget 返回 tracer isotope