pH
pH(氢离子指数)
Explanation (EN)
A logarithmic measure of acidity defined as pH = −log[H⁺]; < 7 acidic, = 7 neutral, > 7 basic at 25 °C.
Explanation (ZH)
酸度的对数量度,定义为 pH = −log[H⁺];25 °C 时 < 7 为酸性,= 7 为中性,> 7 为碱性。
About the IPA
The International Phonetic Alphabet is a standardized system of symbols used to represent the sounds of spoken language.
It helps linguists, language learners, and educators accurately describe pronunciation across languages.
Example: the word "hello" in British English is transcribed as /həˈləʊ/ in IPA.