问答题 翻译：Their solubility is due to the elevated pressure and temperature existing underground.

问答题 翻译：As is well known, gas mixtures do not follow the simple gas laws but deviate from them when placed under pressure.

问答题 翻译：As pressure and diameters increased, it was found that compressibility of the gas that occurs when the gas is under pressure errors into the calculation, and the revised formula was eveloped to account for this property of natural gas.