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abundance
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        1. The relative amount of agiven element among others; for example,theabundance of oxygen in the Earths crust isapproximately 50% by mass2. The amount of a nuclide (stable or ra-dioactive) relative to other nuclides of thesame element in a given sample. T......(本文共 622 字)     [閱讀本文] >>

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