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- A radioactive isotope of thorium with mass number228. 射钍钍的放射性同位，质量数为
- Thorium isotope 钍同位素
- A radioactive isotope of carbon, especially carbon 14. 放射性碳碳的一种放射性同位素，尤指碳14。
- 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
- Marie found another called thorium. 玛丽发现了另一种物质，叫钍。
- The symbol for the isotope deuterium. 氘的化学符号同位素氘的符号
- In this case the geologists drilled into the stalagmites and estimated their age from the way that uranium decays into an isotope of thorium. 地质学家在石笋上钻孔，使用铀衰变成钍的同位素的方法确定它们的年龄。
- 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
- URANIUM AND THORIUM ISOTOPIC EVIDENCE FOR DETERMINING MINERALIZED SECTORS OF THE SANDSTONE TYPE URANIUM DEPOSIT 确定砂岩型铀矿矿化地段的铀、钍同位素证据
- Its most common form, or isotope, has 146 neutrons. 它最常见的形式或者同位素有146个中子。
- IS ~(40)Ca_(20) A STABLE ISOTOPE? ~(40)Ca_(20)是否稳定?
- Simmons: Get me a sample and some isotope readings. 弄些样本和同位素读数。
- Isotope shifts and hyperfine structure spectrum[J]. 引用该论文 马洪良.
- Changes of nuclear mass and nuclear size cause isotope shifts. 原子核质量和大小的不同引起同位素移动。
- This is clearly confirmed by the detection of thorium. 这显然证实了检测钍.
- The isotope ratio is directly used for comparing oils or gases. 同位素比率直接用于比较各种石油或天然气。
- An hour later the next lighter stable isotope, xenon 134, appeared. 一小时之后，略轻一点的稳定同位素氙134出现。
- This indium isotope was created at the same time as the earth. 这种铟同位素与地球产生在同一时代。
- The most abundant isotope of hydrogen,H1,with atomic mass1. 氘氢的数量最丰富的一种同位素，H1，原子质量为1。
- They recognized that in a thorium province Pb208 would present complications. 他们承认，含钍区内的Pb208会产生干扰。
