Now, why are thorium and uranium interesting?

现在，为什铀很有趣？

Curie soon found that the element thorium emitted similar radiation.

居里很快发现元素会发出类似的辐射。

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

即使发射电子， 我们也不使用通常的电子符号。

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

利用铀这两种其他元素的痕迹，他们能够确定这两种石笋的年代。

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的氡土壤中的铀。

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

调查该题的英特尔科学家发现， 陶瓷中即使含有微量的铀也足以引起题。

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

氦子核显然带有正 2 电荷， 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.

这些流石的年龄可以通过其中放射性元素铀的比例来确定。

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

铀发射的阿尔法粒子能量大， 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，如果铀子在衰变成时处于激发态，它可以同时释放伽马波以及我已经提到的阿尔法粒子。

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的地球化学分析显示，其微量元素如、铀钾的浓度与阿波罗任务嫦娥五号任务所回收的样本有显著不同。