In order to achieve perfect forward and perfect backward secrecy, and to counteract cryptoanalysis, the group session keys should be rekeyed.

为达到完美向前和完美向后保密以及对付密码分析，需要更新组会话密钥。

youdao

If this is not a new session we should already have the group information stored in the session so we skip the remaining code.

如果这不是个新会话，那么我们应该已经把组信息存储在会话中了，这样我们就可以跳过余下的代码。

youdao

During my last hospitalization, in one group therapy session, we were asked to draw a picture of how we saw ourselves in the next month.

在我最后一次住院的一次团体治疗期间，我们被要求描述衣服我们在下个月将如何看待自己。

youdao

We got more than 2, 000 comments to the piece in Slate, and it became a mass group therapy session.

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But Mr Castro missed a golden propaganda opportunity, by being late for the group photo session (which went ahead without him).

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The group kicked off the session with a live performance of the finale from Dvorak's "American" String Quartet, a staple of the chamber-music repertoire that sounded fresh in this young group's hands.

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