water level gage

例句：

1. 1. The engineer used a water levelgage to measure the depth of theriver.
   工程师使用水位计测量河流的深度。
2. 2. The farmers used water level gagesto monitor the water levels in their fields.
   农民们使用测水仪来监测他们的田地中的水位。
3. 3. The hydroelectric plantinstalled a water level gage at thedam to ensure safe operation.
   水电站安装了一台水尺在大坝上，以确保安全运行。