Efficiently eliminating pollution of water and lowing cost of water treatment are not only the important errand of environment protection, but also the important errand of water resource protection.是什么意思_Efficiently eliminating pollution of water and lowing cost of water treatment are not only the important errand of environment protection, but also the important errand of water resource protection.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句