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。

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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。

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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。

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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.

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The most obvious attempt was when we gave them an offer that said we are going to provide the conversion of some of the low-enriched uranium that they already have into the isotopes that they need for their medical research and for hospitals that would serve up to a million Iranian citizens.

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