请问这句话中的impression怎么理解？
And to the best of my information and belief, the signature on the certification of the document, and the impression of the seal, both appearing on the document attached hereto, are genuine.
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Impression在这里指的并不是我们熟知的“印象”，而是“压印”的意思：An impression of an object is a mark or outline that it has left after being pressed hard onto a surface. 在这里可以处理为“戳记”。因此这句话可以翻译为：同时尽本人所知所信，附件中出现的文件证明上的签名和印章戳记均是真实的。
