belt of water table fluctuation

例句：

1. 1. The belt of water table fluctuation is the area where groundwater flows beneath the surface.
   水层波动带是地下水流在地表以下的区域。
2. 2. The study of this belt is crucial for understanding the movement of groundwater.
   研究这个带对于理解地下水的运动至关重要。
3. 3. The construction of a pipeline through this belt could significantly improve water supply in the region.
   通过这个带的管道建设可以显著改善该地区的供水情况。