1.The city's challenge, chiefly, is to dispose of cesium-137, a radioactive isotope with a half-life of 30 years.
这座城市面临的最大问题就是处理铯—137，这是一种半衰期为30年的放射性同位素。
2.These cancers can be prevented if children are given pills containing the non-radioactive isotope of iodine soon after exposure.
这些癌症其实是可以避免的，只要在受到辐射之后，马上给儿童们服用不具有放射性的碘的同位素做成的药片。
3.A radioactive isotope of iodine widely used as a tracer in medical diagnosis.
放射性碘碘的一种放射性同位素，广泛地用于医学诊断作为追踪剂
4."What it amounts to, " said Billings, "is that The Goose can convert any radioactive isotope into a stable one. . . "
“也就是说，”比林斯说道，“这只鹅能够把任何放射性同位素转变成稳定的同位素…”
5.Those radioactive elements are N-16 the radioactive isotope (or version) of nitrogen (air).
这些发射性元素包括：氮16（空气中氮元素的放射性同位素）。
6.A radioactive isotope of carbon, especially carbon 14.
放射性碳碳的一种放射性同位素，尤指碳14。
7.Study of Binding Mechanism between Endogenous and Exogenous Cadmium and Chromium with Hair by Means of Radioactive Isotope Labelling
利用放射性核素示踪技术对镉及铬与毛发结合机制的研究
8.Determination of lateral groundwater recharge using single well techniques of a radioactive isotope
用同位素测井技术确定地下水侧向补给量
9.Investigation and Countermeasures on the State of Radioactive Source and Radioactive Isotope and Radial Ray Equipment in Dali
大理州放射源、放射性同位素和射线装置现状调查与防治对策
10.Research on improving the disturbance resistance ability of radioactive isotope aircraft fuel density measurement
提高同位素测量航空燃油密度精度的方法研究