The problem of distribution optimization of monopolistic enterprises could be taken as a problem of a network with "directed sides" to change the distribution optimization into a problem of spatial price equilibrium(SPE) with unknown demand function,so that customs equilibrium principle in traffic net optimization could be used.
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He directed them to different sides of the car, and they all put their hands under the frame.
他指示他们呆在车的各侧，然后他们都把手放在车上。
The functional union of the new facilities takes place underground, through the ramps on both sides which are directed towards the underground swimming pool and gymnasium.
新设施的功能单元在地下，它通过两侧的旋梯与地面连接。 旋梯通向地下游泳池和健身房。
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