例文
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- The optimal pH for the antimicrobial activity is below pH 6.5.
- Optimal pH range will vary depending on the organism.
- The optimal pH for the batter is between 5.5 and 6.8.
- The optimal pH of the soil should be between 5.2 and 7.5.
- Also, certain conditions ( sub-optimal pH conditions or unsuitable cation concentration ) can lead to false negatives.