Deep underneath your feet is a hellish stone soup, kept hot by a torrent of radiation from poisonous isotopes of uranium, thorium and potassium in the earth's superheated mantle.
我们脚下深处是地狱般的岩石汤，在温度非常高的地球地幔中，有毒的铀、钍和钾元素的同位素释放出的辐射流不断地对这些岩石汤进行加热，使其保持高温。
There are different kinds, or isotopes, of uranium, and the type used in nuclear power plants is called uranium-235, because these atoms are easiest to split in two.
铀有许多不同的种类，或称同位素，而在核电站中所使用的是铀235这一类，因为这些的原子最容易一分为二。
However, some of the minerals contain xenon isotopes unlike those usually produced by radioactive decay of uranium.
然而，有些含氙同位素的矿物并非如此，是由铀的放射性衰变产生的。
The measurement of the decay of radioactive isotopes, especially uranium, strontium, rubidium, argon and carbon, has allowed geologists to more precisely determine the age of rock formations.
对放射性同位素衰变的测量，尤其是铀、锶、铷、氩和碳，可允许地质学家更精确地确定岩层的年龄。
Its stable isotopes are all end products of radioactive decay of uranium and other heavy elements.
其稳定的同位素为铀和其它重金属放射衰变后的最终产物。
The Earth has cooled since its formation, yet the decay of radiogenic isotopes, and in particular uranium, thorium and potassium, in the planet's interior provides a continuing heat source.
研究人员发现，在地球传送到大气的热流中，地球内部放射性同位素衰变所产生的热量占了其中一半。
The Earth has cooled since its formation, yet the decay of radiogenic isotopes, and in particular uranium, thorium and potassium, in the planet's interior provides a continuing heat source.
研究人员发现，在地球传送到大气的热流中，地球内部放射性同位素衰变所产生的热量占了其中一半。
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