palimpsest

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Some of it is lost, as the DNA palimpsest has been erased and re-written.
由于DNA的“原手稿本”已经擦拭并重写，有些信息便遗失了。
One of the most spectacular feats in this field concerns the so-called Archimedes Palimpsest.
在此领域最为叹为观止的成果就是所谓的“阿基米德复写稿”。
Few autobiographical works, from the respective Confessions of St. Augustine (397 CE) and Rousseau (1769) to, say, Gore Vidal's Palimpsest (1995), feel as warmly open as Modern Nature.
自传作品中除了分别由圣·奥古斯丁（公元397年）和卢梭（1769年）所写的《忏悔录》，戈尔·维达尔的《羊皮书》（1995年）之外，则很少有如《现代自然》这般袒露至诚者。

Each institution has been given five of the palimpsest's 170 pages.
ECONOMIST: The Archimedes palimpsest
By passing light from the palimpsest through a filter made up of liquid crystals, the researchers can adjust the wavelengths of the pictures that result by 10 billionths of a metre at a time.
ECONOMIST: The Archimedes palimpsest
The collector, however, has now made the palimpsest available for study, and it is being prodded and probed by scientists at Johns Hopkins University in Baltimore and at the Rochester Institute of Technology in New York state.
ECONOMIST: The Archimedes palimpsest: Eureka!

a very old text or document in which writing has been removed and covered or replaced by new writing

a manuscript on which two or more successive texts have been written, each one being erased to make room for the next
(of a text) written on a palimpsest