According to this line of thought, the verbal abilities that blossom in the two year old allow events to be coded in a form radically different from the action-based codes of the infant.

根据这个思路，两岁的儿童发展出的语言能力可以使他们对事件的组织方式与婴儿基于动作的组织方式有根本的差异。

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They also devised technologies—permissive action links, go codes, and redundant command-control links—that minimized the chance of accidental or unauthorized launches.

他们还采用各种技术，例如行动授权环节，密码和多保险的指挥控制环节，来减少意外或未经授权发射的可能性。

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Update: If you want the year codes automatically calculated for you, or simply want to see the math in action, I created a downloadable Excel spreadsheet (44 KB) that does exactly that.

更新：如果你想看一套已经算好的年代码，或者只想看看其中的数学规律，我编制了一个Excel试算表(44kb)以供下载。

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Keynote briefings by specialists to improve compliance for the vulnerable majority will be followed by development of a 2011-15 strategic action plan, setting objectives for mapping codes, standards resources and compliance activity with ways of addressing gaps.

UNESCO: Disaster Preparedness and Mitigation

Under West Point's strict conduct codes, cadets may be disciplined for receiving an improper email and failing to take action.

WSJ: West Point rugby team benched over improper emails