pH是什么意思_pH怎么读_中英文释义(含例句用法)

(from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic);

中英词源

pH 酸碱值

来自德语pH,来自Potenz,能力，力量，词源同potent,H,氢离子，缩写自hydrogen ion.

pH: 1909, from German PH, introduced by S.P.L. Sörensen, from P, for German Potenz "potency, power" + H, symbol for the hydrogen ion that determines acidity or alkalinity.
ph: now in English usually representing "f," originally it was the combination used by Romans to represent Greek letter phi (cognate with Sanskrit -bh-, Germanic -b-), which at first was an aspirated "p," later the same sound as German -pf-. But by 2c. B.C.E. had become a simple sound made by blowing through the lips (bilabial spirant).

Roman "f," like modern English "f," was dentilabial; by c. 400, however, the sounds had become identical and in some Romanic languages (Italian, Spanish), -ph- regularly was replaced by -f-. This tendency took hold in Old French and Middle English, but with the revival of classical learning the words subsequently were altered back to -ph- (except fancy and fantastic), and due to zealousness in this some non-Greek words in -f- began to appear confusedly in -ph-, though these forms generally have not survived.

词态变化

权威造句

1. 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。

2. A pH test measures the acidity or alkalinity of a substance.: pH值测试可检测物质的酸碱度。

3. a pH of 7.5: pH值7.5

4. 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。

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。

近反义词

pH indicator PH值指示剂,氢离子...

urine pH 尿酸碱度

pH meter 酸碱计,氢离子浓度计...

相似短语

pH meter pH 计, 酸度计, 氢离子浓度测定仪

pH value (pH值) 酸碱度

pH value pH 值, 氢离子(当量)浓度负对数值

pH meter 氢离子计，氢离子浓度计，酸碱计

ph electrode 【机】 pH电极

gastrointestinal pH 胃肠pH

optimal pH 最佳pH值，最适pH

pH of semen 精液pH值

pH range 【医】氢离子范围

ph scale phr. 酸碱度标度

单词分析

暂无,等待补充.

记忆方法