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1. The nuffieldite was a mysterious object that had been found in the desert.
这个nuffieldite是一个在沙漠中发现的神秘物体。
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2. The nuffieldite had been studied by scientists for decades.
这个nuffieldite已经被科学家研究了几十年。
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3. The nuffieldite was discovered during a search for ancient artifacts in the desert.
这个nuffieldite是在沙漠中寻找古代文物时发现的。