A German alchemist called Johann Friedrich Bottger was asked by the king to make gold out of lead.
国王要求一位名叫约翰·弗里德里希·伯特格的德国炼金术士用铅来炼金。
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The researchers used their technique to create an image of the sun inspired by the drawings of Robert Fludd, a 17th-century alchemist (the sun is the alchemists' symbol for gold).