有人问他华氏温标下水的沸点。
这种气体是硫化氢，上升后与石灰岩裂缝中地下水的氧气混合。
This gas is hydrogen sulfide, rises up and mixes with oxygen in the underground water that sits in the cracks and fissures in the limestone.
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。
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.
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