银河系中最年老的恒星表现出一种对氢而言的贫金属性。
The oldest stars in the galaxy exhibit a metal deficiency relative to hydrogen.
贫金属星的中子俘获元素丰度与恒星的形成和演化密切相关，它为研究星系形成早期的历史背景和化学演化提供了重要信息。
The abundances of 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.
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