单向流动的

As for the outflow of human capital, the higher level of human capital, the lower possibility of returning as countryside owing to the frailness of agriculture and the inherent wage disparity between urban and rural areas. That is that this flow way of the rural human capital, generally is a state of unidirectional loss or net loss, which leads to an existence of serious"misplaced effect"in rural human capital investment.

对于流出去的人力资本来说，由于农业的弱质性以及城乡固有的工资差异，其人力资本水平越高返回农村的可能性越小，也就是说，农村人力资本的这种流动基本上呈一种单向流失和净流失状态，这就决定了我国农村人力资本投资存在着严重的投资收益"错位效应"。

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。