使人口过密

Overpopulation brought a bitter struggle for existence; internal wars and nomadic invasion sapped the people's vitality; a primitive written language, monopolized by a bailiff class of scholars, prevented the popularization of culture and successive Asiatic despotisms made impossible political growth and condemned them to economic backwardness.

人口过密引起了残酷的生存斗争；内战和游牧民族入侵使民族的元气大伤；为士大夫阶级所垄断的方块字妨碍了文化的普及；累世相传的亚细亚专制政体扼杀了政治的进步，造成了经济的落后。

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。