To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios ofelements rather than simply the abundancesof atoms.
为了比较陨石和太阳的成分,我们需要利用元素的比率,而不单单是原子的丰度。
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The exact abundancesof the three lightest elements are an important test of the so-called Standard Model of physics-the list of fundamental particles found so far and the forces that link them.
The abundancesof neutron-capture elements in metal-poor stars, tightly related to the star formation and evolution, provide important clues to the chemical evolution of the Galaxy.