In my opinion, the curvature was determined experimentally.
依我
，
曲度
根据
定的。
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英语短文 According to China's laboratory analyses, it was found that the samples are approximately 2 billion years old, significantly younger than those retrieved by the Apollo mission, which are estimated to be between 3 and 4.4 billion years old.
根据中
验室分析，发现这些样本大约有 20 亿年历史，比阿波罗任务检索到样本要年轻得多，后者估计在 3 至 44 亿年之间。
