Imitative gastric juice pH 7 can help chitosan to deadsorb on liposome and it is also important point for control release.

模拟胃酸pH 7时有助于Chitoan去吸附现象，这是进行控制释放的有利指 标；

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But they differ from cholinesterase in that they do not catalytically hydrolyze acetylcholine bromide or butylcholine bromide at pH 7—8.

植物水解酶与胆碱酯酶的区别在于它们不能催化溴化乙酰胆碱或溴化硫代乙酰胆碱水解。

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Pure water is neutral with a pH of 7.

纯净水是中性的，PH值为7。

《柯林斯英汉双解大词典》

Thomas Lachocki, the CEO of the National Swimming Pool Foundation, says that in order to be properly chlorinated, pools should contain 1-4 parts per million of chlorine and pH levels should be within 7.2--7.8.

CNN: Yuck! What's in your pool water