用污水灌溉

Currently, 70 percent of sewage is treated and used for irrigation.

现在，70%的污水已经被用於灌溉。

All this comes as China grapples with a mounting water shortage. Across the country, millions of tons of raw sewage, industrial waste and fertilizer runoff have turned lakes into algae-covered cesspools. According to official statistics, more than half of China''s major waterways are so polluted that fish are dying or water is unsafe for drinking or irrigation. More than 300 million people -- almost one-quarter of the population -- lack access to clean drinking water, the government says.

所有这些问题都是在中国水资源日益短缺的大背景下出现的在全国许多地方，大量未经处理的污水、工业废水以及含有化肥残留的农田用水把众多湖泊变成了污水池，大片水面被藻类所覆盖从官方的统计数字看，中国一半以上主要河流的污染程度已经严重到了鱼虾绝迹或河水已无法供饮用和灌溉之用的程度

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。