橡胶的硬化

They are complex mixtures of organic compounds, including various gum resin s, fats, or waxes and, in some instances, poisonous compounds, suspended in a watery medium with dissolved salts, sugars, tannins, alkaloids, enzymes, and other substances from which the latex (or natural rubber, the only available rubber until 1926) can be concentrated, coagulated, and vulcanized.

它们是复杂的有机化合物的混合物，含有各种树胶、脂肪或蜡，在某些情况下还含有有毒的化合物，悬浮于溶解有盐、糖、丹宁酸、生物碱、和其它物质的水性介质中，从中可浓缩、凝结和经硬化处理出乳胶(或天然橡胶，是1926年以前唯一可获得的橡胶来源)。

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。