Land supply and the structure of house supply are the two factors contributing to the disequilibrium between supply and demand.
而土地供应和房屋供给结构是引致供需失衡的两大因素。
The enclosure structure of a passive solar house is not only a collector of solar energy but also a store and a radiator and it is a convenient and economical way of heart supply.
被动式太阳房的围护结构既是收集太阳能的集热器，又是蓄热器和散热器熏是一种方便、节约的采暖方式熏但是太阳房集热效率较低也给其推广造成了一定的负面影响。
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