When necessary, departments for public security and traffic control shall, according to the decision of the flood control headquarters, execute traffic control on land and in water areas.是什么意思_When necessary, departments for public security and traffic control shall, according to the decision of the flood control headquarters, execute traffic control on land and in water areas.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句