two-dimensional flow

例句：

1. 1.The two-dimensional flow of the river is a significant factor in its water quality.
   河流的二维流动是其水质的一个重要因素。
2. 2.In this study, we investigated the two-dimensional flow patterns of the fluid.
   在这项研究中，我们研究了流体的二维流动模式。
3. 3. The two-dimensional flow model is widely used in engineering design.
   二维流动模型在工程设计中被广泛使用。