He often surprised people by his significant and blissful looks and smiles, that seemed to express some secret understanding with them.
他经常以他那意味深长的自己感到幸福的目光和微笑(似乎他们之间已有默契)，使遇见他的人感到吃惊。
Its members are to be found in all nations and classes, and all through the ages, and there is a secret understanding between them when they meet.
这个贵族的成员每个国家都有，每个阶层都有，每个时代都有，他们相遇时心有灵犀，相知相惜。
As usual when crypto is involved, the starting point for understanding the system's design is to think about the secret keys: how many there are, who knows them, and how they are used.
按照惯例，当出现加密的时候，理解整个系统的出发点就是思考跟密钥有关的问题：有多少密钥，谁持有，如何使用。
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