对比历史数据可知，洱海寡毛类和摇蚊科比例继续增加，表明湖泊有机污染进一步加重。

Compared with historical data, the proportions of Oligochaete and Chironomid in Erhai Lake continued to increase, which implied that the organic pollution in the Lake was further intensified.

youdao

对比历史数据可知，洱海寡毛类和摇蚊科比例继续增加，表明湖泊有机污染进一步加重。

Compared with historical data, the proportions of Oligochaete and Chironomid in Erhai Lake continued to increase, which implied that the organic pollution in the Lake was further intensified.

youdao