System of urban infrastructure facilities 1. Urban sewage treatment 2. Municipal wastes 3. Comprehensive treatment of air pollutants 4. Development of clean energies 5. Improvement of human habitation是什么意思_System of urban infrastructure facilities 1. Urban sewage treatment 2. Municipal wastes 3. Comprehensive treatment of air pollutants 4. Development of clean energies 5. Improvement of human habitation在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句