1.
Exempt Items of Radioactive Substances
放射性物质的豁免物品
2.
make radioactive by adding radioactive material.
通过增加放射性物质使具有放射性。
3.
radioactive half life
放射性物质的半衰期
4.
Low Specific Activity Materials
低化活度放射性物质
5.
unsealed radioactive substance
非密封的放射性物质
6.
radioactive processing plant
放射性物质处理装置
7.
sealed source [radioactive substance]
密封源〔放射性物质〕
8.
high-level cell
高放射性物质工作室
9.
(the sending out of)rays and atomic particles from radioactive substances
（自放射性物质中放射出的）射线和原子粒子
10.
Regulation of radiation protection for handling nonsealed radioactive material
GB11930-1989操作开放型放射性物质的辐射防护规定
11.
Quality assurance for packaging used in the transport of radioactive materials
GB15219-1994放射性物质运输包装质量保证
12.
contaminated clothing,eg by radio-active material
受污染的衣物（如受放射性物质污染）
13.
giving off light or heat or radiation: the physical temperature of the emitting material.
散发出光、热或射线的：放射性物质的物理温度。
14.
any of several radioactive gases that are isotopes of radon and are products of radioactive decay.
"几种氡的同位素的放射性气体,是放射性物质衰变的产物."
15.
Unsealed radioactive substances--Identification and certification
GB/T7161-1987非密封放射性物质识别和证书
16.
low-level analysis
低剂量放射性物质的分析
17.
the chemistry of radioactive substances.
化学中有关放射性物质的分支。
18.
Regulations for the Safe Transport of Radioactive Materials
放射性物质安全运输规则