They all focus on face-to-face communication and fast release cycles, and they aim to deliver a working piece of software in short time periods.

它们全都集中于面对面的交流和快速的发布周期，并且它们的目标都是在短时间内交付软件的可工作部分。

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These include a change to payments for casual overtime - largely meaning short periods of working, such as dealing with an important message on a day off.

BBC: Analysis: Can police pay be cut?

Instead vagrants, who wandered from job to job, were frequently whipped and sent to prison for short periods if they weren't working.

BBC: Were single mothers better off in the 19th Century?

In recent months, a number of relatives of BBC Persian staff had been detained for short periods of time by the Iranian authorities and urged to get their relatives in London to either stop working for the BBC, or to "co-operate" with Iranian intelligence officials, Mr Thompson said.

BBC: Iran accused of intimidating BBC Persian staff