Even if the sour-sensing cells signal that the carbonation is sour, there are more elements to the process of actually tasting, say, soda water.
虽然酸感应细胞能感应到饱和碳酸的酸性，但在实际品尝的过程中会品尝到很多的元素，比方说，苏打水。
The sour-cell enzymes might be maintaining the pH balance of the taste buds, and the tang of soda water is just fallout.
酸感应细胞酶也许维持着味蕾的PH值平衡，而苏打水强烈的气味恰好刺激了它。
Therefore it is necessary to know the water content of sour natural gas in design and operation.
因此，在工艺设计、装置核算中都需要确定天然气的含水量。
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