Secondary
仲 (zhòng) / 二级 (èr jí)
Explanation (EN)
In organic chemistry, secondary refers to a carbon atom that is bonded to two other carbon atoms. Secondary carbon atoms are less reactive than primary carbon atoms but more reactive than tertiary carbon atoms.
Explanation (ZH)
在有机化学中，仲是指与另外两个碳原子键合的碳原子。仲碳原子的反应性低于伯碳原子，但高于叔碳原子。
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.