Mandarin:
晶界

Explanation in English Language (EN):
The interface between two grains in a polycrystalline material, affecting mechanical and electrical properties.

Explanation in Mandarin (ZH):
多晶材料中两个晶粒之间的界面，影响其力学和电学性能。

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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.