pH

Such polyaggregates are stable only over very narrow temperature and pH regions.

这些多聚集体只有在非常窄的温度和pH范围内方是稳定的.

Hemagglutination of some viruses has a particular PH requirement.

某些病毒的血凝反应需要一定的PH值.

A pH test measures the acidity or alkalinity of a substance.

pH值测试可检测物质的酸碱度。

The inflection point at this PH is barely detectable.

在此PH值下,拐点不易发现.

A buffer system resists a change in pH.

缓冲系统对pH的变化是有耐受能力的.

Pure water is neutral with a pH of 7.

纯水是中性的，酸碱度为7。

A solution which resists pH changes is known as a buffer solution.

能够阻止pH值变化的溶液称为缓冲溶液.

a pH of 7.5

pH值7.5

pH is a measure of the concentration of free hydrogen atoms in a solution.

pH值是测试溶液中自由氢原子浓度的单位。

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。

You don't need a Ph.D to decode their work, but they do try to challenge audiences with unconventional material.

解读他们的作品并不需要有博士学位，但他们的确在尝试用一些非传统素材来挑战观众的接受度。

He always drags his Ph . D . into every discussion.

他讨论发言的时候总是要生拉硬扯到他的哲学 博士 头衔.

The fluid that emerges from the vents is acidic (pH 3) and hot.

从那些出口出来的液体呈酸性（pH值为3），且是热的。

Two Ph . D . theses attest to the results of his work.

有两篇哲学 博士 论文论证了他的研究结果.

That man is a total phony, he palms himself off as a Ph . d.

那家伙是个彻彻底底的冒牌货, 他冒称是个博士.