底部煤层

The thickness of the metallic layer is in positive correction with the development of phosphorite but in negative correction with the thickness of the stone coal layer.

黑色岩系的底部为厚度不等的磷块岩层，其上为金属层或石煤层，金属层的厚度与磷块岩的发育呈正相关，与石煤层的厚度呈负相关。

On the model it extends all the way to the seam where the top and bottom connect and ends?

该模型的延伸，所有的方式向煤层哪里顶部和底部的连接和结束？

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。