图3用一种二维表达表示了这一分离在RUP中是如何描述的。
Figure 3 shows a two-dimensional representation of how this separation is depicted in RUP.
GIS数据的二维表达和可视化手段已经比较成熟，但事实上距高质量显示还有很大的距离。
Although the 2d representation and 2d visualization method of GIS data is mature, it is far from high-quality visualization.
利用等效弹性法分析了压电矩形共振器的二维耦合振动，导出了振子共振频率的解析表达式。
Based on the equivalent elasticity method, the plane coupling vibration of a rectangular piezoelectric ceramic plate was studied and the resonant frequency equation was derived out.
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