| 1. | When the epd began the programme in 2004 and 2005 , it included the first nine bioindicators above , while the other four community indicators , monitored once every three years , were included in 2006
环保署于2004至2005年开展生物指标计划时，首先监测了前九种生物指标，其馀四种指标的监测工作于2006年开始进行。 |
