The present invention can improve the ecological environment of aquiculture pond obviously.
使用本发明方法，可显著改善池塘养殖生态环境。
The first step to change the economic condition is to improve the fragile ecological environment.
要改变陕北经济落后的现状，首先要改变陕北脆弱的生态环境。
The first step to change the economic condition is to improve the fragile ecological environment.
要改变陕北经济落后的现状，首先要改变陕北脆弱的生态环境。
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