abundance
工業科技

        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] >>