... 氦的同位素 isotopes of helium 钾的同位素 isotopes of potassium 金的同位素 isotopes of gold ...
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以上来源于: WordNet
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.
FORBES: Looking For Energy, Google Goes To Hell
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