Through analyzing on chemical composition of precipitation in Wuhu from 1989 to 1997 the paper showed that precipitation acidification was obvious and being worse .

• 本文对 1989- 1997年芜湖市降水化学成分特征及其变化趋势进行了分析 ；结果表明芜湖市降水酸化明显 ；有逐步趋于恶化的迹象 .