So if the power system cannot grasp the rule of power demand cycle fluctuation, it is unable to deal with the market change and satisfy the power demand of the entire society.

电力系统如果不能认识和把握电力需求周期波动的规律，就无法应对市场的变化，也就无法满足全社会对电力的需求。

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This paper analyses the random process of traffic flow fluctuation of the traffic control system and presents the subsystem quasi -junction method for the determination of signal cycle of the system.

本文通过对城市干道交通控制系统交通流波动特性的随机过程分析，提出了确定该系统信号周期的子系统比拟法。

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Both domestic business cycle and economic fluctuation of the world have led to the insufficiency of aggregate DE - mand in China's present economy.

我国需求不足是国内经济周期与世界经济周期共同作用的结果。

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