Some areas, because of their soil texture, topographical position, or distance from rivers or groundwater, have virtually no water available to plants, whereas others do.
有些地区由于土质、地形位置或与河流或地下水的距离，几乎没有水分能提供给植物，而另一些地区则有。
And then, the contour plot will be the topographical map for this graph.
等高线就像是这幅图的地形图。
That was, and remains, a topographical fact. It was also, eventually, irrelevant.
