lowest water level

例句：

1. 1.The lowest water level in the reservoir is 20 feet below the surface.
   水库中的最低水位比水面低20英尺。
2. 2. The floodwaters reached the lowest water level of the river.
   洪水达到了河流的最低水位。
3. 3. The scientists monitored the lowest water level in the lake during their research.
   科学家们在研究期间监测了湖泊的最低水位。