对于这些星龄在数十亿年以上的老恒星来说，唯一的数据点就是银河系中猎户座旋臂上的那颗黄矮星。
The only data point available for such multi-billion-year-old stars is a particular yellow dwarf in the Orion arm of the Milky Way.
对于这些星龄在数十亿年以上的老恒星来说，唯一的数据点就是银河系中猎户座旋臂上的那颗黄矮星。
The only data point available for such multi-billion-year-old stars is a particular yellow dwarf in the Orion arm of the Milky Way.
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