water-quality observation

例句：

1. 1.The government is conducting a water-quality observation to assess the impact of pollution on the river.
   政府正在进行水质观察，以评估污染对河流的影响。
2. 2. The scientist conducted a water-quality observation in the affected area to gather data for further research.
   科学家在受影响地区进行了水质观察，以收集数据进行进一步研究。
3. 3. The city has implemented stricter regulations to ensure that water-quality observations are conducted regularly and accurately.
   该市已实施更严格的规定，以确保定期且准确地进行水质观察。