planar flow structure

例句：

1. 1.The planar flow structure of the river is very beautiful.
   河流的平面流动结构非常美丽。
2. 2. The planar flow structure of the city is very complex.
   城市的平面流动结构非常复杂。
3. 3. The planar flow structure of the data is very important for analysis.
   数据的计划流动结构对于分析非常重要。