1.
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。
2.
A radioactive isotope of thorium with mass number228.
射钍钍的放射性同位，质量数为
3.
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
4.
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。
5.
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
6.
RESEARCH ON SOLVENT EXTRACTION PROCESS FOR REPROCESSING OF Th-U FUEL FROM HTGR
高温气冷堆钍铀燃料后处理溶剂萃取工艺研究
7.
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。
8.
Determination of Rare Earth Elements and Thorium in RE-Nb-Ta Ores by Inductively Coupled Plasma-Atomic Emission Spectrometry
电感耦合等离子体发射光谱法测定稀土铌钽矿中稀土元素和钍量
9.
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
10.
U,Cu,Pb,Zn and Tu in 1:50000 regional geochemistry sample by scattering background internal standard method
散射背景内标法测定1:5万区域地球化学调查样品中铀、铜、铅、锌、钍
11.
determination of mass concentration of sulphur dioxide in ambient air (thorin spectrophotometric method)
环境空气中二氧化硫质量浓度的测定-钍试剂分光光度测定法
12.
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
13.
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。
14.
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。
15.
protactinium-231-thorium-230 dating
镤-231钍-230测年法
16.
air jet and fluid jet
空气射流与液体射流
17.
fertile thorium 232.
能产生裂变物质的钍232
18.
thorium uranium deuterium zero power reactor
重水零功率钍 铀反应堆