非正规制度是指潜行于法律法规、政策规定、条例章程等正规制度之外的一些社会规则体系。

The irregular system are some social rule systems out of the regular system, such as laws, policy provisions, regulations and so on.

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在最后的夜晚，一条蛇进入我的梦中，多日以来潜行于身体与建筑表层之下的必然主题豁然呈现——伊甸园！

In the last night, a snake creeps into my dream, and suddenly the inevitable theme hide under the body and architecture for so many days shows itself-garden of Eden!

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当发现有潜行对手时，观察者的视野会减少（当前的潜行对手会影响视线）。减少范围是50%，40%，20%，0%，取决于目前的观察者视线方向。

When the check for seeing a sneaked opponent is being done, observer's field of view is reduced (for the purpose of checking this one opponent) by 50%, 40%, 20% and 0% depending on the look direction.

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