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English[en]
The metallicity of these old stars is low at −2.3 < < −1.7, which means that the percentage of their mass that consists of "heavy metals" is no more than 1/80 of the corresponding percentage in the Sun.
Chinese[zh]
這些古老恆星的金屬量低於−2.3 < < −1.7,這意味著其質量中由"重金屬"所占的比率,不超過太陽相對應百分比的1/80。

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