[核]?铍同位素
... 铍慢化剂 beryllium moderator 铍同位素 beryllium isotope 偏转磁铁 deflection magnet ...
Another analysis, also published in the journal Science, looks at the amount of the isotope beryllium-10 in the lunar soil.
BBC: Apollo samples reveal Moon's origin
When the Sun becomes more active, this isotope becomes more abundant along with beryllium, another radioactive element.
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