water-level observation

例句：

1. 1.The engineer made a water-level observation every day to check the level of the reservoir.
   工程师每天进行水位观测，以检查水库的水位。
2. 2.During flood season, it is important to conduct water-level observations to prevent damage to infrastructure.
   在洪水季节，进行水位观测以防止基础设施受损是很重要的。
3. 3. The scientists used a sophisticated water-level observation system to monitor the river's flow.
   科学家们使用一种复杂的水位观测系统来监测河流的流量。