Foam acidizing is used on carbonate reservoirs, because it is more retarded and has better fluid-loss control than normal acid.

泡沫酸化用于碳酸盐储层，因为它与正常酸相比反应速度较慢而且防滤失性能较好。

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The lower pH level also enables the cancer to spread by using acid dissolved normal cells as its food source.

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If acid secretions are normal, or if they don't correlate with the patient's symptoms, it is a strong clue that the heartburn has another cause.

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In the bathroom a little while later, we are brushing our teeth when Lamby saunters in, calm, like your college roommate the day after an acid trip, acting like everything is normal.

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