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。
A radioactive isotope of thorium with mass number228.
射钍钍的放射性同位，质量数为
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
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。
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
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
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。
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
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
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
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
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
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。
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。
protactinium-231-thorium-230 dating
镤-231钍-230测年法
air jet and fluid jet
空气射流与液体射流
fertile thorium 232.
能产生裂变物质的钍232
thorium uranium deuterium zero power reactor
重水零功率钍 铀反应堆