为保护好兰州市区越冬雁鸭类，本文对改善城市环境结构提出了几点建议。
In order to protect the Anseriformes in Lanzhou, suggestions for the improvement of the urban environmental structures are given here.
为保护好兰州市区越冬雁鸭类，本文对改善城市环境结构提出了几点建议。
In order to protect the Anseriformes in Lanzhou, suggestions for the improvement of the urban environmental structures are given here.
应用推荐