1.
Other radioactive elements have been discovered since: actinium, radiothorium and mesothorium, ionium, etc.
自那以后发现的其他放射性元素有：锄、放射性钍和新针、镍，等等。
2.
RADIOTHORIUM CONTAMINATION TENDENCY AND CONTROL MEASURE FOR BAOTOU STEEL FACTORY TAILING DAM
包钢尾矿坝周围土壤放射性钍污染趋势及其防治措施研究
3.
Study on Radio-Thorium Nuclides Transfer Process and Its Radiation Effect on People;
稀土材料开发中放射性钍的迁移规律及其对人体所致辐射剂量研究
4.
A radioactive isotope of thorium with mass number228.
射钍钍的放射性同位，质量数为
5.
Either of two decay products of thorium, mesothorium I, an isotope of radium, or mesothorium II, an isotope of actinium.
新钍钍的两种放射性生成物之一，即新钍1号，它是镭的同位素，或新钍2号，它是锕的同位素
6.
a radioactive mineral consisting of thorium silicate; it is a source of thorium that is found in coarse granite.
一种放射性矿物，由硅酸钍组成，是钍的来源，见于粗糙的花岗岩中。
7.
Regulations for safe management of radioactive wastes from the mining and milling of uranium and thorium ores
GB14585-1993铀、钍矿冶放射性废物安全管理技术规定
8.
a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands.
一种软质、银白色、放射性四价金属元素，同位素用作核反应能源，见于钍矿和独居石沙中。
9.
a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium.
一种极不稳定的放射性元素（卤素系列中最重的一种），铀和钍腐烂的产物。
10.
The intensity of a radioactive source.
放射性放射原的强度
11.
active particles
放射性[活性]粒子
12.
The daughter nuclides of radon and thoron tend to become attached.
氡和钍射气的子体易被气溶胶吸附。
13.
prospect [radioactive mineral]
勘探〔放射性矿物〕
14.
apparatus decontamination
设备去污 -放射性
15.
radioactive decay with emission of carbon nuclei
碳核发射放射性衰变
16.
absorption type radioactive transmission gauge
吸收式放射性透射量计
17.
Relating to or caused by radioactivity.
放射产生的关于放射性的或由放射性引起的
18.
radioactive effluent drain pipe
放射性废液排放管道