It wasn't until 1906 that a scholar came across the prayer book in a library and realized it was a palimpsest, and that the underlying layer of texts could only have come from Archimedes.

直到1906年，一位学者才在图书馆偶然发现了这本祈祷书，并意识到它是一本重写本，而且底层的文本只可能出自阿基米德之手。

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The development of successful data security strategies should not only focus on the underlying layer, but should try to cover all threats.

制定成功的数据安全策略不能仅仅着眼于基础层，而应该尽力覆盖所有威胁。

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TOT ("tree of trust") is a simple distributed database with a hierarchical trust system, which uses existing P2P networks as the underlying layer.

是一个简单的 分布式数据库，具有一个 分 等级的信任系统，其在底层使用现有的P2P网络。

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More on the underlying layer in a bit.

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Get through that covering layer and the underlying slivery colour of the aluminium itself will show through the black layer.

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Essentially, they isolated a rectangular column from the surrounding snowpack and used a snow saw to start an artificial fracture by cutting through the weak underlying frost layer, then watched what happened.

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