Mandarin:
球墨铸铁

Explanation in English Language (EN):
A type of cast iron with spherical graphite inclusions, offering improved ductility and toughness compared to gray iron.

Explanation in Mandarin (ZH):
一种含有球状石墨的铸铁，与灰铸铁相比具有更好的延展性和韧性。

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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.