在此基础上,综合已有D9He据,我们可以将“65岁以上老年人占比从7%上升至14%所用年限”作为衡量老龄化速度快慢pmL3标准u4SH
Theglobalbuildingsectorcurrentlymakesuparound30percentoffinalenergyuse,anditsenergysavingspotentialissignificant.