粮食多了,晾晒成了大难题。人们把自家的庭院地面用水泥、沙子打成地坪(或将偏屋用钢筋混凝土打成平顶),用来晾晒粮食,这样,看管方便,晾干的速度快,且干净利落,非常实用。但在方便实惠的同时也带来一些负面效应:一是炎热的夏天特别是中午,水泥地面反射的热浪扑人,使人非常难受,有时只好往水泥地面上泼洒些水来降温,但这也仅 More food, drying into a big problem. People put their own courtyard ground with cement, sand labeled as the floor (or will be labeled as flat roof with reinforced concrete), used to dry the food, so easy to care, dry fast, and neat and very useful . However, there are some negative effects at the same time as being convenient and affordable. First, on a hot summer day, especially at noon, the heat wave reflected by the concrete floor is very uncomfortable. Sometimes it is necessary to sprinkle some water on the concrete floor to cool down. However, only