2.distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions.
用放射性同位素或不寻常质量的同位素使元素或原子显示运动踪迹。
3.FJ-2108P Multifunction Liquid Scintillation Counter has been develeped to measure The activity of lowenergy beta radioactive sample,low energy gamma radioactive isotope and Cherenkov radiation.
为了测量低能β放射性样品、低能γ放射性同位素和切仑科夫（Cerenkov）辐射的强度，研制了FJ－2108P多功能液闪计数器。
4.The importation of the radioactive isotope, radiation equipment and other radioactive materials should come up to applicable state regulations.
进口放射性同位素、射线装置和含有放射性物质的物品的，按照国家有关规定办理。
5.a radioactive isotope of cobalt with mass number 60; a source of exceptionally intense gamma rays; used in radiation therapy.
具有放射性的钴的同位素，原子质量数为，一种能量极高的伽马放射源，用于放射疗法。
6.INVESTIGATION OF ARTIFICIAL RADIOACTIVE ISOTOPE ~(137)Cs IN OKINAWA TROUGH SEDIMENTS
冲绳海槽沉积物中人工放射性~(137)Cs的分布规律
7.a radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction.
使化合物中化学反应的机制显踪的放射性同位素。
8.A naturally or artificially produced radioactive isotope of an element.
放射性同位素天然存在或人工合成的某种元素的有放射性的同位素
9.a radioactive isotope of an element; produced either naturally or artificially.
天然存在或人工合成的某种元素的放射性同位素。
10.The meteorite, which recently fell to the tropical island in Pacific Ocean, proved to be the present well of the thinnest radioactive isotope!
最近落到在太平洋的热带岛陨石证明是最薄的放射性的同位素的现在井!
