Mandarin:
熔融石英

Explanation in English Language (EN):
A type of glass made from high-purity silica, known for its optical clarity and high thermal resistance.

Explanation in Mandarin (ZH):
由高纯度二氧化硅制成的玻璃，具有优异的光学透明性和耐热性。

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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.