McDonald's has been using double-walled paper cups--which have a small pocket of air between them to increase insulation--at about 2, 000 restaurants along the West Coast since 2012.
麦当劳从2012年起在美国西海岸的约2，000家餐厅使用双层纸杯，两层之间有空隙可容纳空气从而增强隔热效果。
China building to true in 2010 energy saving rate 50%, need to comprehensive reform of exterior wall thermal insulation material, the market will greatly increase.
中国建筑要在2010年实现节能率50%，需对建筑外墙进行全面改造，墙体保温材料的市场将会大幅度增加。
A good insulation around the cement favours an temperature increase.
水泥周围的良绝热体又有利于温度的增高。
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