Mandarin:
回火

Explanation in English Language (EN):
A heat treatment process used to reduce the brittleness of quenched steel and improve toughness by reheating to a moderate temperature.

Explanation in Mandarin (ZH):
对淬火钢进行中温加热以减少脆性并提高韧性的热处理工艺。

International Phonetic Alphabet (IPA):
/tˈɛmpəɹɪŋ/

Audio:

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International Phonetic Alphabet (IPA)
- Definition: A standardized system of symbols used to represent the sounds of spoken language.
- Purpose: Helps linguists, language learners, and educators accurately describe pronunciation across languages.
- Example: The word “hello” in British English is transcribed as /həˈləʊ/ in IPA.