observev.观察；遵守；注意到；庆祝observe a division遵守某种分裂状态observed discharge实测流量observed direction观测方向observe a festival纪念节日, 庆祝节日observed frequency观察频数observe a tendency观察趋势observed longitude观测经度observe neutrality守中立observed mean life观测的平均寿命observe the reality观察现实

1. All the EPDs river water quality monitoring operations are carried out by individuals, who visit the monitoring stations, take samples and record data.
   环保署的水质监测工作均由工作人员在每个监测站上采集水样本和记录观察数据。