A valuable fragment or remnant; a rare and precious surviving piece (of cultural heritage, literature, art, etc.)
这本尘封已久的笔记，虽然只有寥寥数页，但其中记录的民间药方，正如吉光片裘，对研究传统医学有着非凡的价值。
Although this long-forgotten notebook contains only a few pages, the folk remedies recorded within it are like a rare and precious fragment, invaluable for the study of traditional medicine.
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