The faces context is missing if this request is the first of a new session.

如果此请求是新会话的第一个请求，就会缺少 faces 上下文。

youdao

Thee reason for my missing the orientation session is that I have had a problem arranging a flight from Shanghai to London.

我不能参加开学指导的原因是我一直没有安排好从上海飞往伦敦的航班问题。

youdao

But, opposition members noticed one Tory assembly member, Victoria Borwick, was missing from the session.

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Richard Dunne did train on Wednesday after missing Tuesday's session because of a sore throat.

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King has a chronic knee injury which needs careful management, but the Spurs star returned to training on Sunday after missing Saturday's session to work on his fitness in the swimming pool and gym.

BBC: England will recover from Rio blow - Steven Gerrard