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》

Skin is naturally slightly acidic and has a pH of 5.5.

皮肤具有天然弱酸性，pH值为5.5。

《柯林斯英汉双解大词典》

Trypanocidal drug suramin is polysulfated and gives a positive alcian blue reaction even at pH 1.

锥虫类药物苏拉明经过多硫酸化处理，即使在 pH 值为1时也会产生阳性的阿尔辛蓝反应。

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We need to have conditions internally that are relatively constant in terms of temperature, and pH, and chemical composition in order for us to thrive.

我们需要体内的环境参数保持相对稳定,这些环境参数包括,温度,pH值,以及化学组成,这样人才能茁壮成长

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If I then put it back into its original condition, lower the heat say, temperature back to body temperature and reduce the pH down to seven again, the molecules will re-nature.

假如我把烧杯的温度恢复到初始状态,降低温度,温度降低到体温,将pH值降低到七,这些分子会复性

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