所屬欄目:英漢雙解無機(jī)化學(xué)
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] >>