不过，课本中所列出的反应，却无法解释某些不寻常金属同位素的出现，例如太阳与流星中所含的钼和钌。
Textbook reactions cannot explain the emergence of unusual isotopes of metals such as molybdenum and ruthenium seen in the sun and meteorites.
它最常见的两种同位素是锝- 98和锝- 99。锝- 99是人工制造的，由钼- 99贝塔衰变得到。
Its two most common isotopes are Technetium-98 and Technetium-99. Technetium-99 is synthetically produced by the beta decay of Molybdenum-99.
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