Now, why are thorium and uranium interesting?

现在，为什么钍和铀很有趣？

Curie soon found that the element thorium emitted similar radiation.

居里很快发现元素钍会发出类似辐射。

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。

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，他们能够确定这两种石代。

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和土壤中铀和钍。

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

调查该题英特尔学家发现， 陶瓷中即使含有微量铀和钍也足以引起题。

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.

这些流石龄可以通过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。

So for example, if that uranium atom is at an excited state when it decays in to thorium, it can simultaneous release gamma waves as well as the alpha particle I already mentioned.

因此，例如，如果铀原子在衰变成钍时处于激发态，它可以同时释放伽马波以及我已经提到阿尔法粒子。

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。