Curie soon found that the element thorium emitted similar radiation.

居里很快发现，元素钍也释放出类似辐射。

Even though the thorium emits an electron we don't use the usual symbol for electrons.

即使钍发射电子， 我们也不使用通常电子符号。

Granite is richer in thorium than other igneous, that is, once molten.

花岗中钍含量比其他火成，也就是曾经熔融石，要丰富。

Rock such as basalt and thorium is radioactive.

像玄武和钍这样石具有放射性。

Now, why are thorium and uranium interesting?

现在，为什么钍和铀很有趣？

Using traces of two other elements, uranium and thorium, they were able to date both stalagmites.

利用铀和钍这两种其他元素痕迹，他们能确定这两种石笋年代。

Since you have lost two of these protons it is not uranium anymore it is thorium.

因为你失去了两个质子，所以它不再是铀了，而是钍。

These are vials of thorium that produce actinium-225.

这些是产生锕-225钍试管。

Intel scientists investigating the problem found that even trace amounts of uranium and thorium in the ceramic were sufficient to cause problems.

调查该问题英尔科学家发现， 陶瓷中即使含有微量铀和钍也足以引起问题。

All this background radiation comes from radon in the air and uranium and thorium in the soil.

所有这些背景辐射都来自空气中氡以及土壤中铀和钍。

Once we know that, its atomic number, then we can figure out that this is going to be thorium.

一旦我们知道了它原子序数，我们就可以算出这就是钍。

To make granite though requires a number of separate distillations which is what gives it high thorium concentrations.

不，要形成花岗则需要多次独立分馏作用，这也就是为什么它具有高钍浓度原因。

The helium nucleus obviously has a plus 2 charge, and the thorium atom would have a negative charge as well.

氦原子核显然带有正 2 电荷， 而钍原子也带有负电荷。

The ages of these flowstones can be determined by the ratio within them of the radioactive elements uranium and thorium.

这些流石年龄可以通其中放射性元素铀和钍比例来确定。

The alpha particles emitted by uranium and thorium were energetic and ionizing enough to create electron hole pairs in the silicone.

铀和钍发射阿尔法粒子能量大， 电离性强， 足以在硅中形成电子空穴对。

One of the decay products of thorium is actinium-225, and actinium-225 is one of the most promising medical isotopes there is.

钍衰变产物之一是锕-225，而锕-225是目前最具前景医用同位素之一。

So for the last 25 years, researchers at Oak Ridge have had what they call thorium cows that they essentially milk.

因此，在去25年里，橡树岭研究人员拥有他们所谓“钍牛”，他们实际上是在挤奶。

Assuming that the thorium was present at the source of concentrations typically seen in granite allowed the scientists to calculate a likely shape for the source.

假设钍存在浓度与通常在花岗中看到浓度相同，科学家们就能计算出一个可能来源形状。

The heat is a leftover from  Earth's formation and from from the decay of radioactive elements like thorium and uranium  that shower the crust with a constant wave of radioactivity.

热量是地球形成时遗留下来，以及钍和铀等放射性元素衰变产生，这些放射性元素不断向地壳释放出持续放射性波。

Geochemical analysis of the Chang'e-6 lunar samples has shown that their concentration of trace elements such as thorium, uranium and potassium is markedly different from the samples retrieved by the Apollo missions and the Chang'e-5 mission.

对嫦娥六号月球样本地球化学分析显示，其微量元素如钍、铀和钾浓度与阿波罗任务和嫦娥五号任务所回收样本有显著不同。