The maintenance management of the city water conservancy facilities is an important work to ensure the safety of the areal flood control and the safety of the people s life and property.是什么意思_The maintenance management of the city water conservancy facilities is an important work to ensure the safety of the areal flood control and the safety of the people s life and property.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句