thorium

1.thorium tetrachloride

四氯化

2.fertile thorium 232.

生裂变物质232

3.The paper presents a design of passive heat-switch between pressure tube and calandria tube of Thorium-based Advanced Nuclear Energy System.

提出了一种用于基先进核系统压力管与排管之间非动热开设计方案。

4.Either of two decay products of thorium,mesothorium I,an isotope of radium,or mesothorium II,an isotope of actinium.

新两种放射性生成物之一，即新1号，它是镭素，或新2号，它是锕素

5.A stepwise carbochlorination-chemical vapor transport(SC-CVT) technique is proposed for separation of thorium from mixed bastnaesite-monazite concentrate.

以氟碳铈矿-独居石混合稀土矿为研究对象,采用分步选择性碳热氯化-化学气相传输反应(SC-CVT),实现与其它稀土元素分离。

6.But an unexpected fact was noted: certain minerals( pitchblende, chalcolite, autunite) had a greater activity than might be expected on the basis of their uranium or thorium content.

但是一个意外事实引起了我注意：某些矿物质(青铀矿物质、铀云母或钙铀云母)活性比根据其铀或针含量所判断要高。