linear flow

例句：

1. 1. The river has a linear flow that is easy to follow.
   这条河流有线性流动，很容易追踪。
2. 2. The train travels at a constant speed along a linear flow of tracks.
   火车沿着一条直线的轨道以恒定速度行驶。
3. 3. The project aims to create a linear flow of information between the two systems.
   该项目旨在在两个系统之间创建一个信息流。