Restaurants in Wuhan have begun the N-l system, which means groups of customers are supposed to order one fewer dish than the number of people in the group.

武汉的餐馆开始实行 N-1 模式，这意味着顾客群体点菜的数量应该比群体的人数少一道。

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But the system variance is going to be on the order of the square root of N times epsilon.

但是系统能量的变化量大约,会是N的平方根乘以ε

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The U.N. says such an agreement should be concluded by 2009 in order to have a system in place in time.

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