energy consumption; energy intensity 1990—1993年间的～降低了，但此后因钢铁和水泥等重工业的蓬勃发展而又急剧上升。Energy intensity fell between 1990 and 1993,but has since risen sharply as heavy industries such as steel and cement have surged./降低～20% reduce the energy intensity; the amount of energy consumed for every unit of GDP by20%