Natural radioactivity
天然放射性
Explanation (EN)
The spontaneous emission of radiation by atoms with unstable combinations of subatomic particles as they transform into more stable atoms.
Explanation (ZH)
亚原子粒子组合不稳定的原子在转变为更稳定原子时自发放出辐射的现象。
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.