The first question of power system classification voltage control is partition of control area.
电力系统进行分级电压控制的首要问题就是对系统进行控制区域的划分。
The classification of library crisis and concrete crisis study is also an important research area.
对图书馆危机应进行合理分类，深入研究每类危机。
The classification of library crisis and concrete crisis study is also an important research area.
对图书馆危机应进行合理分类，深入研究每类危机。
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