Pure substance
纯净物
Explanation (EN)
A material with a specific, fixed chemical composition, e.g. O₂, H₂O, NaCl.
Explanation (ZH)
具有确定化学组成的物质,如 O₂、H₂O、NaCl。
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.