栗疹

This sebum under the skin sebaceous glands produce an oily substance, bacteria in these arrangements do not go out of sebum on the multiplication, there will be two cases of acne: one miliary rash, hair follicles or pores that are blocked; One is the blackhead that seborrhea and darkened.

这种皮脂是皮肤下的皮脂腺产生的一种油性物质，细菌在这些排不出去的皮脂上繁生，就会出现两种情况的痘痘：一种是栗粒疹，表明毛囊或毛孔被堵塞；一种是黑头粉刺，表明皮脂溢出并变黑了。

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。