water level lowering

例句：

1. 1. The reservoir's water level has been dropping steadily since the rainy season began.
   自雨季开始以来，水库的水位一直在持续下降。
2. 2.The farmers have to monitor the water level in their fields carefully to prevent crop failure.
   农民们必须仔细监控他们的田地中的水位，以防止作物失败。
3. 3. The city authorities are working on a plan to lower the water level in the river to prevent flooding.
   城市当局正在制定一个计划，以降低河流中的水位，以防止洪水。